grade 8.8 bolt specification: 1Materials:Carbon steel 2Size:M24*80, ... *270 3Surface:Black,Zinc,Dacro 4Certificate:ISO9 Different types of grade 8.8 bolt specification Details of the product:1Materials: 1045 ... .certificate:2. Various honorary certificates:3.products:Zinc, Black, Dacron grade 8.8 hex bolts4. Factory view figures: PackagingFactory viewTesting equipmentsWorkshop ...