3/4-10 Two Way Reversible Hex Lock Nut Zinc Wax, Pkg of 100

External tooth lock nuts are nuts attached with lock washers typically used to help with convenience of assembly.

1/4-20 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Zinc Bake. Hex head screws are designed to be driven by a wrench or pneumatic tools.

Hex nuts are commonly used in machinery, automotive, and structural applications, and provide adequate strength for many different types of common applications.

Lock nuts remain stiff when placed on bolts. They are useful in applications where vibration may cause a fastener to come loose. Lock nuts are also able to be used to keep other nuts in place by threading over them.

Hex Nut with assembled external tooth lock washer. Washer is free-spinning and provides clamping to mating material when tightened.