Description
Monster Overview:
Achieve flush, low-profile assemblies in tight spaces with #4-40 × ¼″ Phillips Flat Undercut Head Thread-Cutting Screws, Type 23, Zinc-Bake from Monster Bolts. The undercut 82 ° head keeps more threads engaged in thin sheet, while a Type 23 triangular chip-relief pocket clears swarf as it cuts—lowering drive torque and leaving clean internal threads in aluminum, mild steel, and plastics.
Bright zinc plating followed by a hydrogen-relief bake offers classic corrosion protection with full RoHS compliance. Each screw is fully threaded and supplied in the fixed ¼″ length listed here.
Monster Features:
- Undercut Flat Head: Shallow countersink maximizes thread engagement in thin or brittle materials.
- Type 23 Cutting Point: Triangular chip pocket ejects chips for smoother cutting and lower drive torque.
- Phillips Drive: #1 Phillips recess ensures precise, cam-out-resistant installation.
- Zinc-Bake Finish: Bright zinc plating with post-plate bake mitigates hydrogen embrittlement—fully RoHS compliant.
- Monster Quality: Tight tolerances, batch inspection, and fast U.S. shipping.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | #4-40 UNC |
| Length | 1/4″ (full thread) |
| Head / Drive | Phillips Flat Undercut — #1 Phillips |
| Point Style | Type 23 (triangular chip-relief cut-out) |
| Material | Carbon Steel |
| Finish | Bright Zinc-Bake (RoHS) |
| System of Measurement | US / Inch |
| Standards | ASME B18.6.4 & IFI-111 |
More Monster Bolts:
Need complementary hardware?
• Bulk US-inch Nuts
• Bulk US-inch Washers
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