... 4.Standard:GB,DIN,JIS,ANS High quality brass nut bolt 1. Standard:DIN,ANSI, BSW, JSB ans ISO ... . professional manufactuer, offers better quality and price Productbrass nut bolt Materialbrass, copper FinishPlain or as request SizeM4~M60 or as ... Process we use:Cold heading, Cold forging, Hot forging, Forming, Cutting, Shrink diameter, Threading, Thread rolling, Drawing, Pickling, Passirating, Waste ...