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+86 13761105129email:
marketing@gntcn.comProduct information:
Standard:DIN1587
Size:M2-M24, according to customer's demand
Material:Carbon Steel,Stainless steel
Grade:4.8, 6.8, 8.8, 10.9, 12.9
Finish:Plain,Black Oxide, Zinc Plated,Chrome,Zinc Nickel