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SEMS Screws

Standard：DIN 6900 / ISO 10644/ GB/T 9074
Specification：M2.5 - M12
Material：Carbon Steel (1022A, 10B21), Stainless Steel (SS304/316)
Property Class：4.8, 8.8, 10.9
Finish：Zinc Plated (Clear/Blue/Yellow), Black Oxide, Geomet, Dacromet, Nickel Plated.
SEMS Screws / Screw and Washer Assemblies-Pre-assembled:Washers are trapped by the thread rolling process and cannot fall off.