Sell Machine Screw 1.standard:DIN, ANSI, JIS, BS etc. 2.finishing:Plain, zinc plated, zinc yellow plated, black oxide, dicroma Features:1.Available material:Steel, S/S, brass, aluminum etc.2.Available finishing:Plain, zinc plated, zinc yellow plated, black oxide, dicromate, brass plated etc.3.Available standard:DIN, ANSI, JIS, BS etc.4.Available pecking:Bulk, small packing. Machine Screw