FlangeChina Factory Direct DIN Standard SS304 SS316 Ssa2-70 M2-M30 Stainless Steel Hex Flange Lock Nut Hexagonal Nuts with Serrated Flange, Find details about China Nut, Bolt and Nut from Factory Direct DIN Standard SS304 SS316 Ssa2-70 M2-M30 Stainless Steel Hex Flange Lock Nut Hexagonal Nuts with Serrated Flange