hex screw 1)Standards: DIN & ANSI & JIS & IFI 2)Material: carbon steel, alloy steel, stainless steel 3)Size: M8-M20,3/8"--7/8" 4)SURFACE:ZINC ,HDG, PLAIN,DAC,GOEMET 5)Thread:unc unf metric 6)Quality control :ISO 9001 7)Package :Small box ,POLY BAG,Carton+Pallet 8)Payment Term :TT ,LC Or Weston Union 9)Delivery: 30 days or depend on the qty