Description
Monster Overview:
Get dependable strength and a professional flush finish with Bulk 5/16-18 Flat Head Socket Cap Screws from Monster Bolts. Made from premium alloy steel and finished with a thermal black oxide coating, these screws deliver lasting durability and a clean, dark appearance. The 82° flat head seats perfectly flush for mechanical assemblies, machinery, and fabrication projects where precision and strength matter.
All Monster Bolts black oxide socket fasteners are fully RoHS compliant and ship directly from our U.S. warehouse.
Monster Features:
- Thread: 5/16-18 UNC (Coarse Thread) for secure fastening and broad compatibility.
- Material: High-strength alloy steel with thermal black oxide for mild corrosion protection and a clean black finish.
- Drive: 3/16″ hex recess (Allen). Hex keys available here.
- Head Style: 82° Flat Head for flush, professional installations.
- Applications: Machinery, industrial equipment, metal fabrication, and mechanical assemblies.
Monster Specifications:
| Specification | Details |
|---|---|
| Diameter | 5/16″ |
| Thread Size | 5/16-18 UNC (Coarse Thread) |
| Drive Size | 3/16″ Hex (Allen) |
| Head Type | 82° Flat Head Socket Cap Screw (FHCS) |
| Material | Alloy Steel |
| Finish | Thermal Black Oxide (mild protective layer) |
| Standards | ASME B18.3 / IFI-111 / ASTM A574 |
| Compliance | All black oxide socket fasteners are fully RoHS compliant |
| Origin | Ships from U.S. Warehouse |
More Monster Bolts:
Matching Hardware: Pair these 5/16-18 screws with Bulk U.S. Inch Nuts and Bulk U.S. Inch Washers for a complete fastening solution.
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Buy with confidence — fast U.S. shipping and Monster Bolts quality back every order.