Description
Monster Overview:
Fix your project right the first time with Bulk 1/4-28 Socket Head Cap Screws made from 18-8 stainless steel. The UNF fine thread profile delivers smooth engagement, accurate preload, and dependable corrosion resistance—ideal for precision mechanisms, marine and automotive assemblies, robotics, and industrial fixtures.
Monster Features:
- Thread: 1/4-28 UNF (Fine Thread) for precise adjustment and vibration-resistant clamping.
- Material: 18-8 (A2) stainless steel for reliable everyday corrosion resistance.
- Head / Drive: Socket Head Cap Screw (SHCS) with 3/16″ hex (Allen). Hex keys available here.
- Applications: Electronics, marine hardware, precision equipment, fixtures, and light machinery.
Monster Specifications:
| Specification | Details |
|---|---|
| Diameter | 1/4″ (0.2500″) |
| Thread Size | 1/4-28 UNF (Fine Thread) |
| Drive Size | 3/16″ Hex (Allen) |
| Head Type | Socket Head Cap Screw (SHCS) |
| Material | 18-8 Stainless Steel (A2) |
| Finish | Passivated Stainless (as produced) |
| Standards | ASTM F837 / ASME B18.3 |
| Origin | Ships from U.S. Warehouse |
More Monster Bolts:
Matching Hardware: Pair these 1/4-28 fine-thread screws with our 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.



