Description
Monster Overview:
Get strength and precision in a compact design with Bulk #3-48 Button Head Socket Cap Screws from Monster Bolts. Built from premium ASTM A574 alloy steel and finished with a durable thermal black oxide + oil coating, these screws provide exceptional tensile strength, a smooth black finish, and mild corrosion resistance. The rounded button head profile ensures a clean appearance and reduced snag risk — perfect for small machinery, robotics, and precision assemblies.
Manufactured to meet ASME B18.3 and IFI-111 standards, these high-strength socket screws deliver reliable performance in demanding applications. 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: Manufactured from ASTM A574 alloy steel for a tensile strength of 180,000 psi and yield strength of 162,000 psi (≤ 1/2" diameter).
- Button Head Profile: Smooth, rounded design offers a low, finished look with reduced snagging in assemblies.
- Drive: Uses a standard 1/16" hex key for easy installation and secure torque. Available here if you need a fresh one!
- Finish: Thermal black oxide with light oil treatment provides mild corrosion resistance and professional appearance.
- Compliance: Meets ASME B18.3 / IFI-111 standards; material conforms to ASTM A574; fully RoHS compliant.
Monster Specifications:
| Specification | Detail |
|---|---|
| Diameter / Thread Size | #3-48 (UNC – Unified Coarse Thread) |
| Drive Size | 1/16" 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 #3-48 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 1/16" 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 precision, consistency, and customer satisfaction. Trusted by engineers, manufacturers, and maintenance professionals nationwide.