cap screw Material: carbon steel, alloy steel Grade: 4.8 6. ... 10.9 12.9 Surface Treatment: ZP Blacken HDG Socket cap screw1. Standard: DIN, ISO, IFI, BS, AS2. Grade: 4.8 ... : Finish: plain, black,zinc plated CR3+ CR6+., nickel, hot-dipped-galvanized.4. Material: Q195, Q235, 1035.35K,45K 40Gr 35GrMo,42GrMo ... packing: 27X25X15 cm, 25kg/cartonOuter packing: 115X80X60 cm, 36cartons/pallet cap screw