... 4.Standard:GB,DIN,JIS,ANS High quality brass machine screws 1. Standard:DIN,ANSI, BSW, JSB ... professional manufactuer, offers better quality and price Productbrass machine screws Materialbrass, copper FinishPlain or as request SizeM4~M60 ... forging, Forming, Cutting, Shrink diameter, Threading, Thread rolling, Drawing, Pickling, Passirating, Waste water treatment, Grinting, Upseting, Slotted, Sharing, ...