ALBO Hex Head Nuts and Bolts Assortment Kit Available in Stainless Steel SS304 and Grade 5 Zinc/Yellow Zinc Plated versions, this kit provides a complete set of hex bolts, nuts, flat washers, and spring washers. Choose from 300 pcs or 600 pcs kits to suit your needs. Key Features: Assorted Sizes: Includes 1/4"-20, 5/16"-18, and 3/8"-16 hex bolts in various lengths. High Quality: SS304 Stainless Steel ? corrosion-resistant, rust-proof, durable. Grade 5 Zinc/Yellow Zinc Plated ? strength 105,000?120,000 psi, reliable for demanding tasks. Complete Kit: Includes bolts, nuts, flat washers, and spring washers. Convenient Storage: Reinforced case with compartments and size chart for quick identification. Applications: Machinery, automotive, construction, furniture, electronics, motorcycle repair, shipbuilding, 3D printing, and DIY projects. Kit Options: 300 pcs Stainless Steel SS304 300 pcs Grade 5 Zinc Plated 600 pcs Stainless Steel SS304 600 pcs Grade 5 Zinc Plated 600 pcs Grade 5 Yellow Zinc Plated This nuts and bolts assortment kit is a must-have for professionals, mechanics, and DIY enthusiasts.