How do you use a self locking nut?

Place the lock nut against the threaded end of the bolt, just as you would place an ordinary nut. Make sure that if the nut has a raised center portion this faces out; the flat surface of the locking nut should sit flush against the work surface once tightened.

How do you torque a self locking nut?

B. 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.

How many times can a self locking nut be used?

They provide desirable reusability and can be used assuredly up to fifteen times after an initial fastening.

What is the mechanism of lock nut?

All metal prevailing torque type lock nuts achieve their prevailing torque by altering the shape of the nut in some way – most commonly by distorting the threads of the nut, which then bites into the mating part when tightened. The all-metal locking mechanism causes eventual damage to the protective coating of the threads on both bolt and nut.

Is a lock nut reusable?

Tests have shown that the Klincher Locknut was reusable after as many as 30 times. This reusable quality is one of the reasons why jet engine, aircraft and aerospace companies, and other demanding industries, have continued to use them since their introduction in 1943.

What is a locking hex nut?

Hex lock nuts are the most common type of lock nut. They have six uniform sides that create a flat bearing surface. Slotted locknuts are thinner than castle locknuts and have slots along the outside diameter of the nut. They are locked into place with a cotter pin.

What is the abbreviation for self locking nut?

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. 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. [2]

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