2,625 Piece Grade 8 Hex Head Cap Screw, Nut, and Washer Assortment Starter Kit

A fleet shop or industrial maintenance team running Grade 8 UNC hardware for the most common bolt sizes — 1/4" through 1/2" — gets every size it needs in one 40-hole metal bin, organized across five diameters. At 2,625 pieces, this starter kit is the right scale for a single-station shop or a team that doesn't need the full eight-diameter spread of the 72-hole kit. What's Included Grade 8 hex head cap screws — 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, and 1/2"-13, multiple lengths per diameter Grade 8 hex nuts — matching every bolt size in the kit USS flat washers and high-alloy lock washers — one set per diameter 40-hole metal bin — ready to stock 2,625 pieces total Specifications Thread standard UNC — Unified National Coarse Grade SAE J429 Grade 8 Tensile strength 150,000 PSI minimum Finish Yellow zinc Diameters 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13 Washer standard USS Total pieces 2,625 Approx. weight ~148 lbs SKU ASST40C8 Best For Fleet maintenance shops — Grade 8 UNC 1/4" through 1/2" covers the majority of vehicle chassis, suspension, and frame repair fastener needs Construction and equipment crews — structural connections and field equipment repair where Grade 8 strength and coarse thread are standard Agricultural operations — equipment repair and implement maintenance requiring high-strength hardware in the most common imperial sizes Single-station industrial shops — operations that need the full 1/4" through 1/2" Grade 8 UNC range without the footprint of the 72-hole two-bin setup Shops stepping up from the 24-hole kit — adds 7/16" and larger quantity depth for teams burning through fasteners across more diameters Need 9/16" through 3/4" coverage too? Step up to the 3,110-Piece Grade 8 UNC 72-Hole Starter Kit for all eight diameters in a two-bin setup. About Grade 8 Grade 8 is the highest-strength SAE fastener grade commonly stocked in repair and industrial environments. At 150,000 PSI minimum tensile strength, it's the right choice for high-stress connections, structural applications, and anywhere Grade 5 isn't strong enough. The yellow zinc finish provides corrosion resistance for indoor shop storage and outdoor or under-hood use. UNC coarse thread is the standard for most structural and heavy-duty applications — faster to assemble than fine thread and less prone to cross-threading in demanding field conditions. Need fine thread for suspension, engine, or precision work? See our Grade 8 UNF Assortment. Already have a 40-hole bin and just need to restock? The Grade 8 UNC 40-Hole Refill has the same 2,625 pieces without the bin. Starter Kit vs. Refill — Which Do I Need? Starter Kit Refill Fasteners (2,625 pcs) ✓ ✓ USS flat and lock washers ✓ ✓ 40-hole metal bin ✓ Included — Already own one QR-coded labels ✓ Included — Already have them If this is your first purchase, this Starter Kit is the right choice. If you're restocking an existing 40-hole bin, the Grade 8 UNC 40-Hole Refill provides the full fastener load without new storage. Shipping & Ordering Ships within 1–2 business days from our warehouse Volume pricing available — contact us for multi-kit pricing on orders of 3 or more B2B accounts: Fleet managers, facilities teams, and machine shops can apply for a business account with custom pricing and a dedicated rep — contact us to get started