This 5/16" Machine Screw Washer is made of zinc-plated steel and is designed to be used with 5/16" machine screws
They have a 1/4-inch across the flats hex head
polished finish that resists corrosion and wear
the 78/90 zinc and bake coating offers excellent corrosion protection
Its Phillips drive head provides a secure grip for easy installation and removal
3/16X2-1/2 Medium, Standard Duty Coil Pin Plain Steel And Oil KPRW This 5/16" Machine Screw Washer3 16X2 1 2 Medium, Standard Duty Coil Pin Plain Steel And Oil This 3 16" x 2 1 2" medium, standard duty coil pin is made of plain steel and is oil hardened for increased strength and durability. It is designed for use in a variety of applications, including securing and aligning components, and is commonly used in machinery, equipment, and other industrial settings. The plain steel construction provides good corrosion resistance, while the oil