1.stainless thumb screw fasteners data: SpecificMaterial1.Stainless Steel:SS302, SS304, SS316, (good tenacity)2,Steel:C45(K1045), C46(K1046),C203.Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200CuZn37), C28000(CuZn40)4.Bronze: C51000, C52100, C54400, etc5.Iron: 1213, 1214,12156.Aluminum: Al6061, Al6063 etc7,.Carbon..