... .8,6.8,8.8,9.8,10.9........ Non Standard Fastener,Special Fastener,Iron Fastener.1.What’s the specification of our ... professional manufacturer with more than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2 ... control,good at modern concept of management.3.We have special research person and more than 100 equipment to produce fastener ...