Steel Square Washer
Steel Square lock Washer flat stop type gasket and grommet
Standard: ASTM b633-98 and as required
Composition: C 0.14-0.22,Mn0.3-0.650,Si≤0.30,Cr≤0.30,Cu≤0.30,P≤0.045,S≤0.05，Ni≤0.3
MOQ: 50 000pcs
material grade: US STEEL 1020, JAPAN STEEL SS400, DE, EN, FR S235JR, ISO E235.
Additional function: Anti-rust, Corrosion resistant, decration
Surface treatment: Blue and white Zinc, or as required
Heat treatment: quenching，annealing, surface carburization
other service: OEM, ODM, Customized available on products and package.
