Item Model Black ASTM A 563 Grade B/A563 B Heavy Nut Item No. TY130 Grade Grade 2/5/8 Class6/8/10 Material 45#, 40Cr, 35CrMo (SAE1045, 5140, 4135) Color Black Oxide, Grey Phosphate, Yellow/Silver Zinc Coating, Dacromet, Gomet Carton Packing Standard neutral export packing; Buyer required brand packing MOQ Normally it's 3000pcs each model Delivery Time 4 - 5 weeks for 1 x 20' FCL Payment Term T/T: 30% deposit, balance paid before shipment or against copy of B/L Certificates ISO 9001:2000 test approved