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DIN/ASTM flange nut1.carbon steel,alloy,al,cu,SS,etc2.zinc,black,HDG.etc.3.also as the customer need.
All kinds of nuts Class: 6/8/10 Gr.2/5/8 Material: Steel/Stainless Steel/Brass Surface treatment: zinc plated, black, H.D.G
flange nut