... 3Surface:Black,Zinc,Dacro 4Certificate:ISO9 Different types of grade 8.8 bolt specification Details of the product:1Materials: 1045, 45 ... 270 3Standard: DIN, ASTM, GOST, JIS, AS, etc. 4Grade: 8.8 (4.6, 5.6, 10.9, 12.9, etc.) 5Surface: Black ... Various honorary certificates:3.products:Zinc, Black, Dacron grade 8.8 hex bolts4. Factory view figures: PackagingFactory viewTesting equipmentsWorkshop Welcome ...