... 2013 top quality and customized all size of bolt nut in dongguan and shenzhenWe can supply various bolts ... Plating; Tin,Silver plating,zinc/nickel/chrome plating, hot galvanized, painting, PVC powder coating, dichromate plating,ect.Tolerance+/- ... ,agricuture,etc.Machining equipmentCNC milling&turning machine, general milling&turning machine, grinding machine.File FormatSolidworks,Pro/Engineer,Auto CAD, ...