1/2-13 Nylon Insert Heavy Pattern Hex Nut Zinc, Pkg of 200

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.

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

1 1/4-12 Thin Pattern Nylon Insert Hex Lock Nut Fine Thread Zinc Yellow. Hex head screws are designed to be driven by a wrench or pneumatic tools.

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

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