1)Nut: M3-M64 2.)Materials option: Stainless Steel 304, 304L, 316, 316L, 321, 317L,904L,2507,,2205,C276, 1.4529. 254SMO, AL6XN 1).Standards: GB ,ANSI, DIN, JIS and BS, etc. 2).Packing : Plywood case or wooden box 3).Exported countries:United States, Germany, Saudi Arabia, South Korea,etc. 4). factory price, accept small order and short delivery time