Nylon Lock Nut

The key features shown are:

• s: Width across the flats of the hexagonal nut head

• h: Height or thickness of the nut

• m: Diameter of the nut

• d: Diameter of the threaded hole

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• The nylon insert or locking collar within the internal threading of the nut

The nylon insert is the distinguishing feature that identifies this as a nylon lock nut, also known as a nylock nut. This nylon insert creates a locking mechanism that prevents the nut from loosening due to vibration, shock, or other forces that could cause a standard nut to back out over time.

The angled lines in the cross-sectional view at the bottom of the drawing indicate the 15-30 degree prevailing torque element created by the nylon insert. This prevailing torque helps maintain the nut's tightness and resist unintended loosening.

Nylon lock nuts are commonly used in applications where maintaining a secure connection is critical, such as in machinery, automotive, and construction hardware. The nylon insert allows the nut to be reused while still providing reliable locking performance.