Description
Monster Overview:
Fix your project right the first time with Bulk 1/2-20 Button Head Socket Cap Screws from Monster Bolts. These high-strength fasteners are precision-made from ASTM A574 Alloy Steel and finished with a thermal black oxide + oil coating for a professional black appearance and mild corrosion protection.
The fine-thread (UNF) design allows for greater tensile strength and better resistance to vibration loosening, making these screws ideal for high-performance mechanical, automotive, and tooling applications. All Monster Bolts black oxide socket screws are fully RoHS compliant and meet or exceed ASME and IFI standards.
Monster Features:
- Material: Alloy steel manufactured to ASTM A574 (12.9 metric equivalent) for superior strength.
- Finish: Thermal black oxide + oil for mild corrosion protection and a clean, matte-black look.
- Thread: 1/2"-20 UNF – Fine Thread (Unified National Fine).
- Drive: 5/16" Hex Key (Allen) Drive – Available here if you need a fresh one!
- Head Type: Button Head – smooth, low-profile design for precision and aesthetics.
- Compliance: All Monster Bolts black oxide socket fasteners are RoHS compliant.
Monster Specifications:
| Attribute | Specification |
|---|---|
| Diameter | 1/2" |
| Thread Size | 1/2"-20 UNF (Fine Thread) |
| Drive Size | 5/16" Hex Key |
| Head Style | Button Head Socket Cap Screw |
| Material | Alloy Steel – ASTM A574 (12.9 Equivalent) |
| Finish | Thermal Black Oxide + Oil |
| Tensile Strength | 180,000 psi (≤ 1/2"), 170,000 psi (> 1/2") |
| Hardness | Rockwell C39 minimum |
| Standards | ASME B18.3 / IFI-111 |
Measurement Note:
Length is measured from under the head to the tip of the screw. Button heads are not included in the overall measurement.
Matching Products:
- Matching Nuts: Bulk U.S. Inch Nuts
- Matching Washers: Bulk U.S. Inch Washers
- Hex Keys: 5/16" Allen Key – Available here
Order Yours Today:
Buy with confidence! Every order from Monster Bolts is backed by our commitment to quality, fast shipping, and customer satisfaction.