Lock nuts provide greater efficiency for many applications and allow manufacturers and designers to attain a reliable fit without the use of lock washers. Your fastener distributor understands the two different styles of lock nuts and can help you to choose the ideal design for your project. Types of Lock Nuts Depending on the application, […]

Lock nuts provide greater efficiency for many applications and allow manufacturers and designers to attain a reliable fit without the use of lock washers. Your fastener distributor understands the two different styles of lock nuts and can help you to choose the ideal design for your project.

Types of Lock Nuts

Depending on the application, you need to choose between the basic types of lock nut:

  • Prevailing Torque Lock Nuts – these nuts have a characteristic or design feature that creates friction in the threads to resist loosening.
  • Surface-Bearing Lock Nuts – these are designed as free-spinning nuts, and tighten once exposed to a bearing surface.

Common types of prevailing torque styles include the two-way reversible lock nut, flex-type and nylon insert lock nut. Your fastener distributor agrees that the all metal types work best in high temperature applications or those that include chemical exposure. If you application demands fasteners that can be re-used, a nylon insert lock nut may be your best choice.

Common types of surface-bearing lock nuts include a serrated flange nut and a kep nut. Corrosion can become a problem with the serrated flange style, although this type works well for oversized and irregularly shaped holes.

What to Consider

A fastener distributor considers various aspects of your application when advising the ideal choice. Conditions such as temperature and chemical exposure make a major difference, but smaller details must be considered as well.
Will you need to re-use or adjust the nut on a regular basis? A nylon insert lock nut may be the best option. Hole size and shape may also dictate the ideal choice, especially if that hole is irregular or larger than average.
Speak to your fastener distributor about the details of your project. Certain aspects make certain styles of lock nuts a wiser choice. In all applications, the best design and quality manufacturing allow for a durable, valuable choice.

About the Author

Larry Melone
By Larry Melone
President

Started my career in the fastener world in 1969 at, Parker Kalon Corp. a NJ based screw manufacturer located in Clifton, NJ working in inventory control, scheduling secondary production and concluding there in purchasing. In 1971 I accepted a sales position at Star Stainless Screw Co., Totowa, NJ working in inside sales and later as an outside salesman, having a successful career at Star I had the desire with a friend to start our own fastener distribution company in 1980 named: Divspec, Kenilworth, NJ. This was a successful adventure but ended in 1985 with me starting Melfast in August 1985 and have stayed competitive and successful to date. Melfast serves the OEM market with approximately 400 accounts nationally.

Related Posts

See All