... 2008,ROHS 4.Standard:GB,DIN,JIS,ANS High quality brass machine screws 1. Standard:DIN,ANSI, BSW, JSB ... ISO standard or non-standard as request&design.2. Material: brass, copper3. Grade: as request4. Dimension: M4~M100 or ... , Cutting, Shrink diameter, Threading, Thread rolling, Drawing, Pickling, Passirating, Waste water treatment, Grinting, Upseting, Slotted, Sharing, Kurnling, Polishing, Punching, ...