... /ASME B18.2.1 IFI A10 Size: M3-M30, 1/4"-1 7/8" Material: carbon steel 35#,,brassGrade: 8.8,10 ... ,SAE J429 GR.5/GR.8Surface: Black, Zinc Cr+3, Yellow Zinc Cr+6,H.D.G., Dacromet, etc.Packing: bulk, box packing ... as:Machine screw, self tapping screw, set screw, wood screw, dry wall screw, self drilling screw; Hex nut, hex flange nut ...