Description
Monster Overview:
Built for production environments and field repair, these Bulk 5/16"-18 Socket Head Cap Screws are Made in the USA from high-strength alloy steel and finished with a clean, uniform thermal black oxide. The coarse UNC thread and precise socket recess deliver predictable torque and reliable clamp force across fixtures, tooling, and machinery.
All Monster Bolts black oxide socket fasteners are fully RoHS compliant and ship fast from our U.S. warehouse.
Monster Features:
- Thread: 5/16"-18 UNC (Coarse) for strong engagement and quick assembly.
- Material: Alloy Steel per ASTM A574 with thermal black oxide appearance-focused finish.
- Drive: 1/4″ Hex (Allen). Hex keys available here.
- Head: Socket Head Cap Screw (SHCS) for compact, high-strength clamping.
- Use Cases: Jigs/fixtures, automation equipment, presses, robotics, and general MRO.
Monster Specifications:
| Specification | Details |
|---|---|
| Diameter | 5/16" |
| Thread Size | 5/16"-18 UNC (Coarse Thread) |
| Drive Size | 1/4″ Hex (Allen) |
| Head Type | Socket Head Cap Screw (SHCS) |
| Material / Finish | Alloy Steel, Thermal Black Oxide |
| Standards | ASME B18.3 / IFI-111 / ASTM A574 |
| Compliance | RoHS Compliant |
| Origin | USA |
More Monster Bolts:
Matching Hardware: Pair with Bulk U.S. Inch Nuts and Bulk U.S. Inch Washers for a complete fastening solution.
Order Yours Today!
USA-made quality, RoHS compliance, and fast fulfillment — count on Monster Bolts for bulk socket fasteners.