Prevailing torque nut? (TOP 5 Tips)

Prevailing torque values Prevailing torque differentiates a locknut from a free spinning nut based on a value of how much torque is required during installation before clamp loading. For example, on a nylon-insert nut, it is the torque needed to overcome the resistance of the nylon dragging across the mating thread.

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  • A prevailing torque nut is any type of lock nut that has a prevailing torque to assist in preventing self loosening. Technically speaking, nylon insert locknuts fall under this description. Still, if someone refers to prevailing torque lock nuts, they typically refer to Stover or top lock nuts.

Are prevailing torque nuts reusable?

The prevailing torque locknuts can be reused only for a limited number of times because each time the nut is used, there is a decline in its prevailing torque quality. That is why it is recommended to use thread lubricants and torque valves.

How does a prevailing torque lock nut work?

The prevailing torque in prevailing torque locknuts comes from localized plastic deformation to an interference fit with continuous sliding during assembly. Continuous sliding – contacting thread surfaces of the locknut and bolt are sliding across each other as the nut is installed.

What is prevailing torque feature?

PREVAILING TORQUE – a design feature of the lock nut produces friction between threads of mated components thereby increasing the force needed to tighten as well as loosen the nut. The two main categories of prevailing torque type nuts include: all metal and nylon insert lock nuts.

What is minimum prevailing torque?

The torque required to run a nut down a thread on certain types of nuts designed to resist vibration loosening. The resistance can be provided by a plastic insert or a noncircular head. A type of lock nut which has a prevailing torque to assist in preventing self loosening.

Do Nylock nuts need to be torqued?

Usually nuts are free spinning, but Nylock nuts have a plastic patch that causes resistance to nut turning. This resistance is called ” prevailing torque “. Prevailing torque is the torque required to turn the nut. None of the prevailing torque goes toward tightening the bolt.

What is a prevailing lock nut?

Prevailing torque lock nuts are one piece, prevailing torque hex nuts with a conical top and a flat bottom bearing surface with chamfered corners. The locking action, created by distortion of their top threads, is said to resist loosening caused by shock, vibration and other dynamic forces.

Can you reuse a lock nut?

Are Lock Nuts Able to be Reused? They are able to be reused, but only if the prevailing torque meets certain specifications. Lock Nuts with a Nylon Insert are perhaps the most reliable lock nut, as it is only limited by the temperature of the application it has been used in.

What is the difference between a nut and a lock nut?

Traditional nuts simply consist of a basic threaded hole, so constant exposure to vibrations can knock them loose from the bolt on which they are placed. Lock nuts protect against loosening, however, by featuring a design that increases the nut’s resistance to vibrations.

How do you calculate prevailing torque?

The prevailing torque will vary less than 75% from the value shown from the first to the fifth installation and beyond. 3) Calculated using formula: Nominal diameter x Clamp Load (from note 1) x Friction factor (dimensionless value of 0.20 for dry installation).

How many dots does a flanged prevailing torque nut have?

These prevailing torque nuts are designed for high-strength applications, for use with Grade 8 bolts. Six dots at 60° intervals on the top of the flange identify this product as a Grade G prevailing torque flange nut.

What is a Stover nut?

Stayloc nuts, or often referred to as Stover nuts, are self-locking. They are prevailing torque, type of hexagon lock nuts. Stover nuts are easy to install as they’re simply screwed on to a thread. Not only that, but they are also available with Flange for secure fastening and are very cost effective.

How do you torque a self-locking nut?

When torquing a self-locking nut, the nut should be run down on the threads of the bolt until the nut almost contacts the mating surface. The amount of torque required to run the nut down (friction drag torque) should be measured and added to the amount of torque specified for the fastener.

Is prevailing torque the same as running torque?

TORQUE is designed for use under the Microsoft Windows operating system and will determine the tightening torque and preload for a threaded fastener. The prevailing torque is the torque required to run a nut down a thread before engagement with the joint surface.

Why are washers used under nuts?

washer, machine component that is used in conjunction with a screw fastener such as a bolt and nut and that usually serves either to keep the screw from loosening or to distribute the load from the nut or bolt head over a larger area. To prevent loosening, several other types of washers are used.

What does breakaway torque mean?

Remember that breakaway torque is that moment in time when the previously torqued (static) fastener begins to move again (dynamic torque). Once that movement happens, it cannot be created or captured again. If you loosen the fastener, you’ve just changed the joint that someone worked so hard to create.

Prevailing Torque Lock Nuts – Fastener Mart

To continue purchasing, select a Prevailing Torque Lock Nut type from the drop-down menu above. They are one-piece, predominant torque lock nuts with conical tops and flat bearing surfaces on the bottoms, with corners that have been chamfered to reduce frictional losses and increase strength. They claim that the locking action, which is achieved by deformation of their top threads, prevents loosening caused by shock, vibration, and other dynamic forces. Because they are top locking and only the bottom surface is flat, prevalent torque lock nuts are referred to as one way lock nuts because they are only inserted in one direction—from the conical top to the flat bottom surface.

Torque lock nuts, which are widely used in agricultural equipment as well as the automotive and metallurgy sectors, are also known by the following names:

all metal lock nuts, all steel lock nuts, automation style lock nuts, top lock nuts.

Lock washers are not utilized in conjunction with current torque lock nuts. The term “prevailing-torque locking fasteners” refers to fasteners that include a self-contained characteristic that generates frictional interference between the threads of the mating components, according to the definition. Thus, unlike freely rotating lock nuts, there is a resistance to rotation during both installation and disassembly, necessitating the use of a wrench to remove the lock nuts; this resistance is referred to as “prevailing torque.” Self-disassembly is unlikely to occur even if the preload is totally reduced as a result of the residual rotational resistance present.

  • Furthermore, because they retain their position even when not fully installed, they can be utilized as stop nuts or spacers for spinning or other components.
  • The nominal thread diameter of a torque lock nut is referred to as the prevailing torque lock nut size.
  • The size is provided in inches, and is commonly expressed as a fraction rather than a decimal.
  • Grades B, C, and 9 are the most frequent grades, and zinc plating and cadmiumwax are the most typical finishing options.
  • The grade is identified by surface marks.
  • The width and height of the nut are determined by the size of the torque lock nut in use.
  • As a result, many threads of a conventional bolt or screw should reach past the top of the nut in order for the locking action to be effective.
  • Because the prevailing torque decreases with each usage of the nut, prevailing torque lock nuts can only be reused a limited number of times.
  • If you are using prevalent torque lock nuts, you should avoid using normal torque values since the joint may not be tightened to the right clamping force due to increased friction created by the locking feature.
  • Because of this, the bolt or screw should not be considerably longer than is necessary to guarantee complete thread contact with the nut.

Although the IFI 100/107 standard has been superseded by ASME B18.16.6.CI:AMLCKNTS v1.1a, at least one manufacturer continues to sell lock nuts that fulfill the criteria of the IFI 100/107 standard in response to customer demand at this time. Product(s) has been successfully added!

Prevailing Torque Locknuts – How They Work

There is no need for lock washers when using lock nuts that have a high level of torque. The term “prevailing-torque locking fasteners” refers to fasteners that include a self-contained characteristic that causes frictional interference between the threads of the mating components, as defined by the manufacturer. To prevent the lock nuts from rotating freely during installation and disassembly, there is a resistance to rotation present during both operations, which forces them to be torqued. This resistance is known as prevailing torque.

  1. The current generation of torque lock nuts, despite their name, are not permanently locked in place, allowing them to be changed or withdrawn after they have been installed.
  2. There are two types of threads: normal right-hand and the Unified inch coarse series (UNC, Unified National Coarse) or the Unified inch fine series (UNF, Unified National Fine) (UNF, Unified National Fine).
  3. Ordinarily, the diameters range from around 1/4″ to approximately 2″.
  4. Several different sizes are available for certain varieties.
  5. Grades B, C, and 9 are the most popular grades.
  6. The grade is indicated by surface marks.
  7. Nylon torque lock nuts have different widths and heights depending on their size.
  8. As a result, many threads of a conventional bolt or screw should extend above the top of the nut in order for the locking element to engage fully formed threads and provide effective locking action.
  9. Following the manufacturer’s recommendations for nut reuse, thread lubricants, and torque settings is always a best practice.
  10. Conventional torque lock nuts are not deemed ideal for lengthy threaded assemblies because the increased amount of motion along the threads may result in damage to the locking feature of the nut and/or the mating threads, according to industry standards.
  11. In order to determine the current torque lock nut requirements, consult ASME B18.16.6 and IFI 101.

Although the IFI 100/107 standard has been superseded by ASME B18.16.6.CI:AMLCKNTS v1.1a, at least one manufacturer continues to provide lock nuts that satisfy the criteria of IFI 100/107 in response to customer demand. It was successful in adding the product(s).

  • They generate localized plastic deformation on the threads’ contact regions until the contact areas become large enough to withstand the pressures acting on the thread (resulting point stresses are below the yield stress). When the locknut is rotated on the bolt, this deformation occurs over a number of rotations, which causes the predominant torque to “wear off.” They also knock down the microscopic asperities on the thread surfaces, which results in the surfaces being smoother.
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They interact with the coefficient of friction of the surfaces to produce tangential friction forces operating at the pitch diameter, which result in the dominating torque being generated at the pitch diameter. Prevailing Torque Decay is a term that is used to describe the decay of a dominant torque. When the assembly is operating properly as a result of these effects the prevailing torque of a locknut that has a prevailing torque is continually decreasing as the locknut is being fitted.

  • The rate of decay is determined by the following factors: the hardness of the materials
  • The degree to which interference occurs
  • In what way the interference is dispersed throughout the surface of the threads is important.

As a result, even when the prevailing torque levels remain constant, softer material and/or more localized deflections will result in the prevailing torque wearing out at a faster pace than it would otherwise. Variation in the Prevailing Torque There are various usual reasons of variation in the predominant torque of a locknut, including: Part-to-part variations within a lot of the mating part; variations within a lot of the mating part; and variations within a lot of the mating part (bolt)

  • Pitch diameter
  • Thread flaws (nicks, dents, and dings)
  • And other factors.

– Variations from part to part throughout a large portion of the locknut component (the nut before deflection)

  • Pitch diameter
  • Exterior dimensions (height, concentricity of the thread to the hex, width across flats, concentricity of the nylon ring to the thread, diameters and thickness of the nylon ring)
  • Interior dimensions (height, concentricity of the thread to the hex, width across flats, concentricity of the nylon ring to the thread, diameters and thickness of the nylon ring)

– Variations in the manufacturing process

  • In the case of all-metal locknuts with axial deflection, the location of the deflection (particularly in relation to where the thread leaves the top of the locknut) and the degree or depth of the deflection are important considerations to consider.

The consequence of these fluctuations is represented in the torque that is now present. Torque Limits that are currently in effect When establishing upper and lower limits for prevailing torque, it is necessary to take into account the natural effects of decay and variance. Despite the fact that a well-developed deflection mechanism and deflection process can minimize decay and variation, decay and variation controls (such as special nut thread tolerances, special tighter nut dimensional tolerances, special test bolts, complex process tooling, and so on) can add prohibitive expense to a process.

All Metal Prevailing Torque Locknuts: How It Works, Types & Industries

Torque locknuts are a type of lock nut that has a predominating torque to aid in the prevention of self-loosening of the nut. The most often used torque nuts may be classified into two categories: those made entirely of metal and those with a nylon insert. In all cases when the threads are deformed at the nut’s top, the prevailing torque locknut gains the characteristic of being prevailing torque. The nylon inserts torque prevailing nuts, on the other hand, are made of nylon or any other polymer insert that aids in the achievement of a prevailing torque.

The predominant torque in the locknuts operates on three different variants, including localized plastic deformation, interference fit, and continuous sliding, among others.

  • In the case of localized plastic deformation, some of the beginning threads of the nut must come into contact with the mating component before the dominant torque process may begin to operate. In the case of all-metal locknuts, the threads are deflected plastically, resulting in a variety of areas of interference with the threads of the mating part. It is necessary to have negative clearance between the threads of the prevailing torque locknut in order to achieve an interference fit. In other words, there is no touch nor deflection with the mating portion. Continuous sliding occurs when, after the nut has been placed, the thread surfaces of the locknut and bolt come into touch as they glide across one another.

All-metal locknuts are available in a variety of styles.

  • Collar Locknut – This sort of prevailing torque locknut is made entirely of metal and has an oval locking collar. Steel grades 2-5-8, 2H/DH, monel, brass, bronze, and stainless steel are among the materials used. The following finishes are available: uncoated, zinc-coated, cadmium-coated, and mechanically galvanized, as well as additional platings and coatings
  • Hex Locknut — This form of locknut has deflected threads in the middle of the nut, which makes it easier to tighten. Steel grades 2-5-8, 2H/DH, monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. There are a variety of finishes to choose from, including plain zinc, cadmium and mechanical galvanized steel, as well as additional platings and coatings. Dome Locknut – The dome form of this type of metal dominant torque locknut distinguishes it from others. Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. The following finishes are available: uncoated, zinc-coated, cadmium-coated, and mechanically galvanized, as well as additional platings and coatings

Torque locknuts are utilized in a variety of industries. When high temperature, high torque, high vibration, corrosion, and tensile strength are involved in a process, industries rely on all metal prevailing torque locknuts to keep the process running smoothly and efficiently. These locknuts are frequently seen in the following applications:

  • High-temperature and high-vibration applications in aerospace and aviation
  • Turbine engines and automotive turbochargers in military applications
  • Aerospace and aviation applications in shipbuilding

The prevailing torque locknuts may only be reused a limited number of times due to the fact that each time the nut is used, the quality of the prevailing torque decreases. It is thus advised to use thread lubricants as well as torque valves during threading. It is because when the nut is used in lengthy threaded assemblies, it causes damage to both the nut’s locking function as well as the mating part to be damaged. Therefore, if you want to achieve complete thread engagement, it is always advised that the bolt’s length be kept to a minimum length.

It is possible to acquire all metal prevailing torque locknuts from us at wholesale prices, allowing you to save money. Please get in touch with us right away to discuss your requirements.

Stover Prevailing Torque Cone Lock Nuts

Prevailing Torque Lock Nuts, also known as stover hex lock nuts or toplock nuts, are a form of distorted thread nut in which the distorted threading is located on the nut’s conical end. Prevailing Torque Lock Nuts are used to secure a nut to a bolt. It is for this reason that they are referred to as “one-way nuts,” because the nut can only be initiated from one end of the threading. It’s also the reason why they’re referred to as “toplock” or “top lock” nuts. As the fastener is put into the nut, the deformed threading of the nut is stretched, resulting in friction between the nut and the fastener and the creation of the locking action.

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As an alternative to nylon insert lock nuts, they are frequently preferred because, as all-metal components, they are not susceptible to the temperature and chemical limits that nylon inserts are.

Non-Serrated Hex Flange Cone Locking Nuts

A built-in, non-spinning, non-serrated flange is used in conjunction with the cone locking nut to behave in a similar manner as a washer during installation. Hex Flange Cone Locking Nuts are similar to stover nuts in appearance and function. This flange distributes the force applied to the nut across a larger surface area, reducing the likelihood of damage to the installation material. They also save time during the installation process because they do not require the installation of a separate washer at all.

Prevailing Torque Stover Lock Nuts are made of zinc-plated steel and are available in various sizes.

Zinc Plated Steel

Zinc plating for fasteners is by far the most popular and cost-effective form of plating available. A protective “sacrificial” top coating of zinc plating is applied to the fastener to prevent it from corrosion while also providing a gleaming sheen. Zinc plating is appropriate for interior applications where it will not be subjected to prolonged exposure to severe conditions.

Plain Steel

Having a simple “finish” indicates that this fastener is extremely susceptible to corrosion. Plain fasteners work well in non-corrosive interior conditions and are the most cost-effective option for these types of jobs. It isn’t necessary to spend extra money on plating or coating if the item isn’t going to be exposed to corrosion.

FAQs

Stover lock nuts are predominant torque hex nuts that are one-piece, all-metal construction with a conical top and a flat bottom. A distorted thread nut is one that has the distorted threads at the top of the nut, where it turns conical, and they are a form of nut that has distorted threads. Stover is a brand name for conical locking nuts, which are also known as Toplock nuts and prevailing torque nuts in some circles.

What is a top lock nut?

A top lock nut is a type of distorted thread nut in which the distortion is located at the top of the nut, closer to the conical portion, rather than at the bottom.

Because the threads on one side of the nut are deformed, the nut can only be forced onto a fastener in one direction. This friction between the nut and fastener is caused by the twisted thread, which results in the locking action.

Which nut is made with a deformed top thread?

Vibration causes nuts to loosen, therefore a distorted thread locknut is a nut that employs deformed threading to prevent nuts from becoming loose. It would be a top lock or stover nut, which are types of distorted thread locknuts, that would be used for the deformed top thread in this case.

How does a top lock nut work?

As a male fastener is inserted into a top lock nut, it causes the threads of the nut to stretch when it comes into contact with the deformed area. The deformed threads behave in an elastic manner, increasing the friction between the nut and the fastener and resulting in the locking action.

Can you reuse a Stover nut?

Yes, Stover lock nuts may be used more than once. The elastic structure of the nut’s deformed thread, according to theory, can allow the nut to be reused an unlimited number of times. In actuality, the nut loses a small amount of its flexibility with each application. Although it is possible to reuse Stover nuts numerous times, it is typically advisable to use new Stover nuts after several re-fastenings of the nut and in crucial areas.

What is a prevailing torque lock nut?

It is any form of lock nut that has a predominating torque to aid in the prevention of self-loosening that is classified as prevailing torque nut. Nylon insert locknuts, to put it another way, fall under this category technically. About be sure, when someone talks of prevailing torque lock nuts, they’re usually referring to top lock nuts or Stover lock nuts.

Prevailing Torque Lock Nuts

Posted on the 28th of September, 2016 by vapro Prevailing Torque (PT) fasteners maintain their resistance to loosening even when subjected to significant friction throughout the assembly process. These fasteners are the best choice for applications that are subjected to significant vibration and shock on a regular basis, as well as harsh temperatures and a high number of loading cycles without interruption. Our PT line-up has passed the examination.

DURA-FLEX

A prevailing-torque locknut made entirely of metal with six flex locking components.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, and stainless steel are among the materials used. Plain, zinc, and cadmium platings, as well as various platings and coatings are available.

360° DOME

A prevailing-torque locknut made entirely of metal with a dome collar on top that provides a 360-degree locking frictional thread interference.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, and stainless steel are among the materials used. Plain, zinc, and cadmium platings, as well as various platings and coatings are available.

C-LOC (Collar)

Locknut made entirely of metal with an oval locking collar and prevailing torque.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, and stainless steel are among the materials used. There are a variety of finishes to choose from, including plain zinc, cadmium and mechanical galvanized steel, as well as additional platings and coatings.

HEX-LOC (Reversible)

A prevailing-torque locknut made entirely of metal with deflected threads in the middle of the nut.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. The following finishes are available: uncoated, zinc, cadmium, and mechanical galvanized, as well as several additional plating and coatings

TRI-LOC

An all-metal prevailing-torque locknut with three locking elements deflected in the top thread and three locking elements in the bottom thread.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. Finishes include plain, zinc, cadmium, hot dip galvanized, mechanical galvanized, and various platings and coatings
  • And

DOME-LOC

Torque dome design locknuts made entirely of metal are the most common.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. The following finishes are available: uncoated, zinc, cadmium, and mechanical galvanized, as well as several additional plating and coatings

360-LOC (Special Reversible)

Prevailing-torque, two-way top lock made entirely of metal. Due to the nut’s 360-degree locking feature, a frictional thread contact is created between the nut’s top and bearing surface.

  • Steel grades 2-5-8, Monel, brass, bronze, and stainless steel are among the materials used. There are a variety of finishes to choose from, including plain zinc, cadmium and mechanical galvanized steel, as well as additional platings and coatings.

O-LOC (Oval)

A prevailing-torque locknut made entirely of metal.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. There are a variety of finishes to choose from, including plain zinc, cadmium and mechanical galvanized steel, as well as additional platings and coatings.

S.T.-LOC (Side Top Lock)

The prevailing-torque locknut is made entirely of metal and has positive thread deflection on both sides of the top.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, and stainless steel are among the materials used. There are a variety of finishes to choose from, including plain zinc, cadmium and mechanical galvanized steel, as well as additional platings and coatings.

COLUMBIAN

Frictional thread interference is created by the use of all-metal prevailing-torque nuts with slotted locking elements on either side of the nut.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. Plain, zinc, and cadmium platings, as well as various platings and coatings are available.

PEL-LOC® (Nylon Pellet)

Unscrewing a two-way locknut with a nylon pellet that extends through the wall of the nut and interferes with the threads by causing frictional thread interference

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel are among the materials used. The following finishes are available: uncoated, zinc, cadmium, and mechanical galvanized, as well as several additional plating and coatings

FLANGE TRI-LOC

All-metal prevailing-torque locknut with three locking elements deflected in the top thread and three locking elements in the bottom thread.

  • The materials used are steel grades 2-5-8 as well as stainless steel. The following finishes are available: plain, zinc plated, hot dip galvanized, and cadmium plated, as well as several additional platings and coatings

N-LOC (Nylon Insert)

This locknut, which is available in large sizes up to 6 inches in diameter, is equipped with a nylon insert locking element.

  • Steel grades 2-5-8, 2H/DH, Monel, brass, bronze, stainless steel, and a variety of exotic metals are among the materials used. Simple plating and coating options include plain zinc, zinc cadmium, hot dip galvanized steel, Xylan/Teflon, and a variety of additional plating and coating options.
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Prevailing Torque Values of Lock Nuts (Metric)

Torque values that are currently in use Prevailing-on torque and prevailing-off torque values for Metric Lock Nuts are shown in the chart below, which is in accordance with the ISO 2320:2008 “Prevailing torque type steel nuts – Mechanical and performance attributes” standard. The following are some major points from the ISO 2320 standard: – ISO 2320 defines the performance criteria of lock nuts when they are tested at temperatures ranging from 10 degrees Celsius to 35 degrees Celsius. – ISO 2320 applies to prevailing torque all metal type nuts (lock nut with metal insert) and prevailing torque non-metallic insert type nuts (lock nut with nylon insert), as well as to predominant torque all metal type nuts (lock nut with metal insert).

Lock nuts with nylon inserts are covered by ISO 2320 in the temperature range of -50 degrees Celsius to +120 degrees Celsius.

Prevailing Torque Values Chart for Metric Lock Nuts:

RESULTS
Parameter Value
Designation
Property Class
Thread Series
Maximum Prevailing-on torque (1 stinstallation)(Lock nut withmetal insert) TFv,max N*m
Maximum Prevailing-on torque (1 stinstallation)(Lock nut withnylon insert)
Minimum Prevailing-off torque (1 stremoval) TFd,min
Minimum Prevailing-off torque (5 thremoval)

Note 1: The performance of the prevailing torque diminishes with the number of reuses; the user should consider the impacts of the lower performance before reusing. Note 2: The off torque values shown above are the minimum values needed by ISO 2320 when performing laboratory acceptance tests in a controlled environment. It is possible that lock nuts will perform differently than expected in typical use.

Definitions:

Alloy steel is a ferrous (or iron-based) alloy that contains significant quantities of alloying materials relative to the iron content (other than C and residual amounts of Mn, Si, S and P). In most cases, these alloying elements are used to increase the mechanical and corrosion resistance qualities of the alloy. Prevailing-on torque is the torque required to spin a nut on an externally threaded component when no clamp force is present. Prevailing-Off Torque: Torque required to spin the nut after it has been backed off until the clamp force in the externally threaded component has been removed.

Supplements:

Link Usage
Metric Thread Calculator Calculatesbasic major, minor and pitch diameters of the metric external (bolt) thread andinternal (nut) thread according to ISO 724:1993 standard. In addition to basic size calculations, tolerance calculationsof different tolerance classes can be done according toISO 965-1:1998 and ISO 965-2:1998 standards.
Nut Grades, Identification Markings and Strength (Metric) Shows proof strength and Vickers and Brinell hardness values of metric nuts made of carbon steel and alloy steel.

Reference:

  • In accordance with ISO 2320:2008, prevailing torque type steel nuts – Mechanical and performance qualities are defined. DIN EN ISO 2320:2009-03 – Prevailing torque type steel nuts – Mechanical and performance qualities
  • DIN EN ISO 2320:2009-03 – Prevailing torque type steel nuts

Prevailing Torque Nuts

MacLean-Fogg Component Solutions is a world-class manufacturer of prevailing torque lock-nuts, and the company has been in business for more than 100 years. Since 1925, we have been supplying industries with bespoke prevailing torque internally threaded fasteners. Our goods include the following:

  • Hex Nuts
  • Flange Nuts
  • Lock Nut
  • Nylon Insert
  • 2 and 3 piece Nut assemblies
  • Weld Nut
  • Whiz-Lock®Serrated Flange Nuts
  • Deflection Nuts
  • Clinck-Lok ®
  • Nut Assemblies
  • Spline Nuts

Please get in touch with us to explore how we can provide a prevailing torque nut solution just for you.

To place an order for our torque nut solutions, please call us at 847-566-0010 or send an email to our Contact Us page.

Industries Served

  • Manufacturing includes automobiles as well as heavy duty trucks and trailers, industrial engines, agriculture, off-highway vehicles, recreational vehicles, military and defense, appliances, furniture, industrial motors, water treatment, industrial solutions, and more.

Lead Production Location

Please Contact Us Regarding This Product

Prevailing torque nut – prevailing torque lock nut – torque lock nut

  • Carbon steel and stainless steel are the materials used
  • The kind of nut is a hex head, all metal locking nut. Thread size ranges from M3 to M39. Finished surfaces include: plain, black oxidized, zinc plated, and yellow plated. Classification: 4.8, 6.8, 8.8, 10.9, and 12.9 The following packaging is available: small box, 25kg bulk package

Prevailing torque nutstypes

Nuts without an insert are single-piece metal nuts in which enhanced friction is achieved by the suitable deformation of the predominant torque element of the nut, rather than by the use of an insert. Two-piece metal nuts are nuts in which higher friction is generated by inserting an extra metal element into the predominant torque element of the nut. Two-piece metal nuts are nuts that are made of two pieces of metal. This kind does not have the capacity to carry its full burden.

Prevailing torque nuts material:

Steels such as carbon steel, stainless steel, and copper

Prevailing torque nuts grade

A2-70, A4-80, 4.8, 6.8, 8.8, 10.9, 12.9, A2-70, A4-80

Surface Treatment of Prevailing torque nuts

Passivated, zinc plated, nickel plated, sandblast and anodize, polish, electro painting (black anodize), plain zinc plated, chrome plated, hot deep galvanized (HdG), etc.

980-m hex nuts dimensions

980-V nuts, with a monthly production capacity of 500 tons. 980-million nuts are produced each month, with a monthly output of 400 tons. There are no minimum order quantities for middle-sized items. The minimum order quantity (MOQ) for grade 8 and higher is one ton of each size. 30-45 days from the time an order is placed to the time it is available for shipment, although this varies depending on the order number. If you have a little order, our stock availability will get it shipped out to you within 7 days.

We will accept tiny box packages, but you must inform us of the number of units or weights in each box.

The second is Ningbo’s seaport, which is located on the coast.

Prevailing Torque Nuts / Lock Nuts – Klincher™ Locknuts

Home Torque Nuts / Lock Nuts are the most commonly used. The Klincher Locknut was developed for use in high torque applications and in industrial applications in general. A large number of prevailing torque nuts or prevailing torque lock nuts have been developed to suit these high torque situations, but none have performed as well as the Klincher Locknut, thanks to its unique design. Studies conducted at a major US university revealed that the stress was evenly distributed across the whole Klincher Locknut, as opposed to the extreme stress concentration found in the first few threads of normal prevailing torque nuts, according to the findings.

  1. This allows the bolt to work better and for a longer period of time, including several repetitions.
  2. When applied to numerous fastening devices, such as lock nuts, self-locking nuts, high torque lock nuts, reusable lock nuts, prevailing torque nuts / lock nuts, and other types of fastening devices, a high torque might have a detrimental impact on their performance.
  3. When it comes to the aviation and aerospace industries, Dual Machine makes both regular Klincher Locknuts as well as bespoke Build-to-Print variants that are required to meet specific dimensions, tolerances, and/or threading requirements.
  4. Whenever high torque, high vibration, tensile strength, corrosion, and high temperature are present, organizations turn to Klincher Locknuts for assistance.

This lock nut is ideal for demanding applications due to its unique design, uniform distribution of stress and strains, and ability to be re-used over and over again. A Klincher Locknut is a kind of nut that is typically used in the following applications:

  • High-temperature and high-vibration applications in aerospace and aviation
  • Turbine engines and automotive turbochargers in military applications
  • Aerospace and aviation applications in shipbuilding

More information, including research information, sizes, and other specifics, may be found at:

Klincher Locknuts – Performance Over the Years!

Inquire with us now to learn more about Klincher Locknuts and to discover how they may assist you in improving your product, method, or application. Call 317-923-4786 or fill out the contact form on ourContact Uspage to get in touch.

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51 Bloyd Avenue, Indianapolis, Indiana 46218-3590317.923.4786 Dual Machine Corporation1951 Bloyd Avenue, Indianapolis, Indiana 46218-35903 Information can be obtained by contacting us. Klincher Locknuts are shipped to customers throughout the United States, including California, Colorado, Illinois, Indiana, Michigan, Minnesota, New York, Connecticut, Ohio, Pennsylvania, Texas, Utah, Florida, Chicago, and Los Angeles, as well as Canada, Mexico, South America, Europe, Germany, France, Belgium, Spain, the United Kingdom / United Kingdom of Great Britain and Ireland, and other countries worldwide.

Serving the Midwest with Swiss Machining and Screw Machine Parts, as well as Precision CNC Machined Parts for Indiana, Ohio, Michigan, Illinois, Indianapolis, Kokomo, Muncie, Lafayette, Terre Haute, Bloomington, Columbus, Fort Wayne, Evansville, Cincinnati, and Dayton, among other locations throughout the region.

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