Double End Bolt,Special 1.ISO,ANSI,CE,JIS,DIN,BS& non-standard ... ,6.8,8.8,9.8... Double End Bolt,Special Head Bolt,Bolt Maker ,M6 Bolt Dimensions1.What’s the specification of our Products ? MaterialsCarbon ... professional manufacturer with more than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2 ...