... !Grade 2, Grade 5, grade 8UNC and UNFStandard hex nut, hex jam nut, heavy hex nut, heavy hex jam nutASTM A194 2H, 4, 8 ... +,Cr6+4. Other Material Options for hex nut:Stainless Steel SS201, SS301, SS304, SS316Grade A2-70. A4-80Other Material available, Nickle, Zinc Alloy, Brass ...