3/8-24 Flex Type Hex Lock Nut Full Height Light Cadmium and Wax 1/4-20-2B and the cap nut is

and the cap nut is then tightened

It has a hexagonal head and a fully threaded shank

meaning that it has a nylon insert that helps to prevent it from loosening

while the black oxide finish helps to protect the screw from corrosion

3/8-24 Flex Type Hex Lock Nut Full Height Light Cadmium and Wax 1/4-20-2B and the cap nut isThe 3 8 24 Flex Type Hex Lock Nut Full Height Light Cadmium and Wax is a versatile and durable nut designed for use in a wide range of applications. Made from high quality steel, this nut is heat treated for added strength and durability. The full height design provides maximum thread engagement, ensuring a secure and reliable connection. The light cadmium and wax finish provides excellent corrosion resistance, making this nut ideal for use in harsh