BARREL NUT,BOLTS AND NUTS 1.ISO,ANSI,JIS,DIN,BS& non- ... 4.8 ,6.8,8.8,9.8.... BARREL NUT,BOLTS AND NUTS SCREWS,BLIND NUTS . A good non-standard fastenerS ... Plated,chromium plated,Tin plated,Black phosphating ,anodized ,Parkerising,and Environmental Plated is used in our products,Hexavalent chromium ... than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2. Our company had ...