Description
Monster Overview:
Strength and precision come together in Bulk #1-72 Button Head Socket Cap Screws from Monster Bolts. Manufactured from high-strength alloy steel and finished with a durable thermal black oxide + oil coating, these screws deliver dependable fastening with a professional appearance and mild corrosion resistance. The rounded button head design offers a smooth, low-profile finish—perfect for assemblies requiring both performance and clean aesthetics.
Each screw meets ASME B18.3 and IFI-111 dimensional standards, with material properties conforming to ASTM A574 for exceptional tensile strength. 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 per ASTM A574 provides ~180,000 psi tensile and 162,000 psi yield strength for diameters ≤ 1/2".
- Button Head Profile: Smooth, rounded head design offers a clean look with reduced snag risk in tight spaces.
- Drive: Uses a standard 0.050" hex key for precise torque control. Available here if you need a fresh one!
- Finish: Thermal black oxide + oil for an attractive matte appearance and mild oxidation resistance.
- Compliance: Meets ASME B18.3 / IFI-111 dimensional specs; material per ASTM A574; fully RoHS compliant.
Monster Specifications:
| Specification | Detail |
|---|---|
| Diameter / Thread Size | #1-72 (UNF – Unified Fine Thread) |
| Drive Size | 0.050" 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 – Black Oxide Finish |
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: Compatible #1-72 nuts available in our Bulk U.S. Nuts Collection.
- Matching Washers: Pair with flat and lock washers from our Bulk U.S. Washers Collection.
- Hex Key: Uses a 0.050" hex key – Available here.
Order with Confidence:
Every Monster Bolts bulk order ships fast from our U.S. warehouse and is backed by our dedication to quality, consistency, and customer satisfaction. Trusted by engineers, manufacturers, and builders nationwide.