Description

Monster Overview:
Upgrade your builds with Bulk #0-80 Button Head Socket Cap Screws from Monster Bolts. Made from premium alloy steel and finished with a thermal black oxide + oil coating, these fasteners provide a clean, professional look with mild corrosion protection. The compact button head offers a low-profile design ideal for applications where clearance and aesthetics matter — such as electronics, robotics, and precision assemblies.
Each screw is precision machined to meet ASME B18.3 and IFI-111 standards and manufactured from material conforming to ASTM A574. This provides consistent high tensile strength and performance equivalent to a metric Class 12.9 screw. All Monster Bolts black oxide socket fasteners are fully RoHS compliant and ship directly from our U.S. warehouse for fast, reliable delivery.
Key Features:
- High Strength: Alloy steel construction per ASTM A574 delivers approximately 180,000 psi tensile and 162,000 psi yield strength for diameters ≤1/2".
- Precision Fit: Button head design provides smooth, low-profile fastening for flush, snag-free installations.
- Drive: Uses a standard 0.035" hex key for reliable torque transfer. Available here if you need a fresh one!
- Finish: Thermal black oxide with light oil treatment enhances appearance and offers mild oxidation resistance.
- Compliance: Meets ASME B18.3 and IFI-111; manufactured from ASTM A574 material and fully RoHS compliant.
Monster Specifications:
| Specification | Detail |
|---|---|
| Diameter / Thread Size | #0-80 (Unified Fine Thread – UNF) |
| Drive Size | 0.035" Hex Key (Allen Wrench) |
| Material | Alloy Steel per ASTM A574 (≈ Class 12.9 Equivalent) |
| Finish | Thermal Black Oxide + Oil |
| Tensile Strength | 180,000 psi (≤1/2" Diameter) |
| Yield Strength | 162,000 psi (≤1/2" Diameter) |
| Hardness | Rockwell C39 Minimum |
| Standards | ASME B18.3 / IFI-111 / ASTM A574 |
| RoHS Compliance | Yes |
Measurement Note:
For button head socket cap screws, overall length is measured from under the head to the tip of the screw.
Matching Products:
- Matching Nuts: Find compatible #0-80 nuts in our Bulk U.S. Nuts Collection.
- Matching Washers: Pair with flat or lock washers from our Bulk U.S. Washers Collection.
- Hex Key: Uses a 0.035" hex key – Available here.
Order with Confidence:
Every Monster Bolts bulk order ships fast from our U.S. warehouse and is backed by our commitment to precision, quality, and customer satisfaction. Trusted by professionals across manufacturing, engineering, and R&D industries.




