MIDWEST FASTENER CORP 34135 Nylon Insert Lock Nut 7/16"-20 Steel Black Chrome 4 hardware

Threaded Lock Nut 7/16"-20

This pack contains four steel lock nuts with a 7/16 inch diameter and 20 threads per inch. A nylon insert grips the bolt threads to resist loosening caused by vibration or torque. The black chrome finish adds a layer of corrosion protection for the fastener. These components suit automotive repairs and general mechanical assembly tasks.

Vibration Resistance Under Load

The nylon insert creates prevailing torque that maintains clamp force when the joint is subjected to continuous shaking or cyclic stress. Unlike a standard hex nut, the insert deforms around the bolt threads to prevent rotational back-off over time. This locking action remains effective through repeated heating and cooling cycles in the assembly. The steel body sustains the mechanical load without stripping.

Compatibility Check Before Purchase

Verify that the mating bolt or stud uses a 7/16"-20 thread pitch before ordering. Confirm the application does not exceed the temperature limits of the nylon insert material. Ensure the black chrome finish meets the corrosion resistance requirements for the operating environment. Check that the pack quantity of four matches the number of fasteners needed for the job.