studs 1.Size:M16-72 2.Grade:10.9,8.8 3.Standard: GB898,GB899,GB900,GB901 4. Surface treatment: customised We have ... strength bolts/screw2) Standard: GB898,GB899,GB900,GB9013) Nominal size: M16-M724) Surface: Zinc, HDG, DAC, Galvanized, Black, Plain5) Grade of ...