Hexagon Nut Kit, 400 piece(s), Stainless Steel material, 18-8 grade, including a(n) (100) 6-32, (100) 8-32, (100)10-32 in. Hexagon Nut and (50) 1/4-20 IN, (30) 5/16-18 IN, (20) 3/8-16 in.