ASTM F436M HARDENED FLAT WASHER.
This ASTM F436M hardened flat washer’s specification covers the chemical, mechanical and dimensional requirements for hardened steel washers.
These washers are for use with fasteners having nominal thread diameters of 1/4″ through 4″ and M12 through M100. These washers are suitable for use with fasteners covered in Specifications A354, A449, A563, A563M, F959/F959M, and F3125.
This specification covers the chemical, mechanical, and dimensional requirements for metric hardened steel washers.
Available Sizes: M12- M100
Available Finish : Hot Dip Galva / Black / Yellow / PTFE.
Type 1—Washers made of carbon steel.