Description

Monster Overview:
Fix your project right the first time with Bulk #8-32 Button Head Socket Cap Screws from Monster Bolts. These fasteners are engineered from premium ASTM A574 Alloy Steel and feature a thermal black oxide + oil coating for mild corrosion resistance and a professional, matte-black appearance. Perfect for applications requiring a low-profile, smooth head — including electronics, machinery, and custom fabrication projects.
All Monster Bolts black oxide socket fasteners are fully RoHS compliant and ship directly from our U.S. warehouse for fast, reliable delivery.
Monster Features:
- Material: High-strength alloy steel meeting ASTM A574 mechanical properties (12.9 metric equivalent).
 - Finish: Thermal black oxide + oil for a clean, uniform appearance and mild oxidation protection.
 - Thread: #8-32 UNC – Coarse Thread (Unified National Coarse).
 - Drive: 3/32" Hex Key (Allen) Drive – Available here if you need a fresh one!
 - Head Type: Button head for smooth, low-profile fastening with excellent tool engagement.
 - Compliance: Black oxide finish is fully RoHS compliant.
 
Monster Specifications:
| Attribute | Specification | 
|---|---|
| Diameter | #8 | 
| Thread Size | #8-32 UNC (Coarse Thread) | 
| Drive Size | 3/32" 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: 3/32" 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.
















