2,655 Piece Grade 5 Hex Head Cap Screw Assortment Starter Kit
For a maintenance operation, construction crew, or general shop that runs Grade 5 UNC fasteners across the full imperial range — 1/4" through 3/4" — this 2,655-piece starter kit stocks all eight diameters in two organized 40-hole metal bins, ready to work from day one.
What's Included
- Grade 5 hex head cap screws — 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11, and 3/4"-10, multiple lengths per diameter
- Grade 5 hex nuts — matching every bolt size in the kit
- USS flat washers and lock washers — one set per diameter
- QR-coded product labels — ready to use
- Two 40-hole metal bins — ready to stock
- 2,655 pieces total
Specifications
| Thread standard | UNC — Unified National Coarse |
| Grade | SAE J429 Grade 5 |
| Tensile strength | 120,000 PSI minimum |
| Finish | Clear zinc |
| Diameters | 1/4"-20, 5/16"-18, 3/8"-16, 7/16"-14, 1/2"-13, 9/16"-12, 5/8"-11, 3/4"-10 |
| Washer standard | USS |
| Total pieces | 2,655 |
| SKU | ASST72C5 |
Best For
- General maintenance and facilities operations — Grade 5 UNC across 1/4" through 3/4" covers the broadest range of standard repair and assembly applications
- Agricultural and equipment shops — the standard fastener grade for farm equipment, trailers, attachments, and general implement repair across all common sizes
- Construction and light-to-medium structural work — coarse thread for framing hardware, equipment repair, and general field fastening from small mounting bolts to 3/4" connections
- High-volume manufacturing and assembly — a complete Grade 5 UNC inventory in two organized bins, sized for operations that need depth across all eight diameters
- Shops building a complete imperial fastener inventory — pair with a Grade 8 kit for full-range strength coverage without mixing grades
About Grade 5
Grade 5 is the workhorse SAE fastener grade for most general automotive, agricultural, construction, and industrial applications. At 120,000 PSI minimum tensile strength, it handles the vast majority of structural and mechanical assembly tasks without the cost or brittleness of Grade 8.
Clear zinc plating provides corrosion resistance for both indoor shop use and standard outdoor applications. Grade 5 also absorbs impact loads better than Grade 8 — a practical advantage in agricultural and construction environments where shock loading is common.
Applications requiring higher strength, such as suspension, structural steel, and heavy equipment connections, call for Grade 8. See our Grade 8 UNC 72-Hole Starter Kit for the high-strength counterpart covering the same eight diameters. If you already own storage and just need to restock, the Grade 5 UNC 72-Hole Refill has the same 2,655 pieces without the bins.
Starter Kit vs. Refill — Which Do I Need?
| Starter Kit | Refill | |
| Fasteners (2,655 pcs) | ✓ | ✓ |
| USS flat and lock washers | ✓ | ✓ |
| Two 40-hole metal bins | ✓ Included | — Already own one |
| QR-coded product labels | ✓ Included | — Already have them |
If this is your first purchase, this Starter Kit is the right choice. If you're restocking an existing 72-hole bin, the Grade 5 UNC 72-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 construction operations can apply for a business account with custom pricing and a dedicated rep — contact us to get started