Detailed Product Description ASTM A194 2H heavy hex nutsDiameters: 3/8" 2-3/4"Grades: A563 (Gr. A,B,C,D and DH), A194 grade 2HFinish: Plain,ZP,Black and hot-dip galvanized Product material: Carbon Steel, Alloy Steel, Stainless Steel, Copper, Nylon, Plastic, etc.Product intensity level: 4.86.88.810.912.9