Bolt standard available in DIN933,IFI C-6,C-10,DIN558,601,ISO4014,BS,DIN7990, DIN6914 ... and also available in stainless, brass DIN931 Carbon Hex Cap Screws and Bolt:1, Over 15years manufacturer and export ... , and imperial, extra long and extra short sizes. 6, ISO management. 7, Also available in DIN933,IFI C ... -6,C-10,DIN558,601,ISO4014,4017,BS BOLTS,DIN7990, ...