(1) Standard: ASTM A193. (2) Grade: B7. (3) Size: M6-M100, 1/4"-4". (4) Material: Alloy Steel. (5) Surface: black, plain, zinc, zinc yellow, PTFE, HDG,etc. (6) Packing: 1 less than 25kgs bulk into carton, then packed on pallet 2 Small box or color box, then into carton, then packed on pallet 3 As customers' request. (7) Payment terms: T/T, L/C, Western Union.