Self Locking Nut Types

3 see page 19 for information on nasm25027 as applied to pem self clinching self locking nuts.

Self locking nut types.

The second nut is held still with a wrench and then the first nut is backed up with another wrench to press tightly against the second nut achieving a locked position on the bolt and also backing the first nut into its desired position. Still in some applications that may not be a problem. A locknut also known as a lock nut locking nut self locking nut prevailing torque nut stiff nut or elastic stop nut is a nut that resists loosening under vibrations and torque. The simplest method of locking a nut using a split pin is shown in the figure.

Nut type pem self clinching nut selector guide 1 describes best practice for typical applications. Most locknuts are available from stock for fast delivery with non standard sizes and specials available to order. Resistant to vibration torque available in stainless steel and other finishes. Choose from our selection of self locking hex nuts including over 1 600 products in a wide range of styles and sizes.

As the most versatile self locking nut in the philidas range it is a popular choice for a number of industrial applications including rail network maintenance and automotive. In the friction method either an additional nut called lock nut or a spring washer is used to lock the nut. Prevailing torque types however are designed to create friction. 5 locking performance is not affected by the number of on off cycles.

Sl self locking nuts are designed with a unique and economical tri dent locking feature meeting 3 cycle locking performance requirements page 7. Fasteners can be used in other panel materials not listed here if specified. The self clinching feature is the same tried and proven design preferred and appreciated for fast simple assembly. The positive methods of locking make use of a split pin or a screw or a lock plate or a tab washer to lock the nut.

This type of nut is used on the hubs and bottom brackets of bicycles to lock any nuts just loose enough to. A philidas industrial nut is an all metal locking hexagon nut designed to have a friction grip between the nut and bolt threads. Once initially loosened however they offer no further resistance to loosening which is their main disadvantage. 6 nylon locking element temperature limit is 250 f 120 c.

4 meets torque requirements for nasm25027 through five cycles. The thread locking performance of types lk lka and lks pemhex self clinching fasteners with md finish is equivalent to applicable nasm25027 specifications. Free running types often rely upon an additional component such as a lock washer or jam nut. Elastic stop nuts and prevailing torque nuts are of the particular type where some portion of the nut deforms elastically to provide a locking action.