Stainless Steel Nut Standard: ANSI/ASME SS Nut Size: from 1/4 to 4-inch (M8 to 48) Stainless Nut Material: A194 2H/2HM; A194 4/4M; A194 7/7M; A194 8/8M SS Steel Nut Surface: black, galvanized, nickel plated, cadmium and plated