Description
Monster Overview:
Precision-engineered for strength and reliability, Bulk #5-40 Button Head Socket Cap Screws from Monster Bolts are crafted from ASTM A574 alloy steel and finished with a black oxide + oil coating for a clean, professional appearance and mild corrosion resistance. The low-profile button head offers a smooth, rounded surface—ideal for assemblies where space is limited or where a finished aesthetic is desired.
These screws meet ASME B18.3 and IFI-111 dimensional standards and are heat-treated for high tensile strength and long-lasting performance. 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 offers approximately 180,000 psi tensile and 162,000 psi yield strength for diameters ≤ 1/2".
- Button Head Profile: Rounded, low-profile design provides a smooth, snag-resistant finish.
- Drive: Uses a standard 5/64" hex key for secure torque transfer. Available here if you need a fresh one!
- Finish: Thermal black oxide with oil coating offers mild oxidation protection and a sleek black appearance.
- Compliance: Meets ASME B18.3 / IFI-111 standards; material conforms to ASTM A574; fully RoHS compliant.
Monster Specifications:
| Specification | Detail |
|---|---|
| Diameter / Thread Size | #5-40 (UNC – Unified Coarse Thread) |
| Drive Size | 5/64" 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 #5-40 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 5/64" 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 quality, precision, and customer satisfaction. Trusted by manufacturers, repair technicians, and builders across the nation.