Grade 5 Zinc-Plated Hex Cap Screw Kits are a collection of fasteners for practical use around the home or workplace. Hex Head Cap Screw sizes and quantities included in kit: (12) 1/4"-20 x 1/2", (10) 1/4"-20 x 3/4", (10) 5/16"-18 x 1/2", (10) 5/16"-18 x 3/4", (8) 1/4"-20 x 1", (6) 1/4"-20 x 1-1/2", (8) 5/16"-18 x 1", (6) 5/16"-18 x 1-1/2", (5) 3/8"-16 x 3/4", (5) 3/8"-16 x 1", (4) 3/8"-16 x 1-1/2", (3) 3/8"-16 x 2". Hex Nut sizes and quantities included in kit: (36) 1/4"-20, (34) 5/16"-18, (17) 3/8"-16. Flat Washers included in kit: (36) 1/4", (34) 5/16", (17) 3/8". Split Lock Washers included in kit: (36) 1/4", (34) 5/16", (17) 3/8".