Description
Monster Overview:
Tackle tight-clearance countersinks with 1/4-20 Phillips Flat Undercut Head Thread-Cutting Screws, Type 23, Zinc-Bake from Monster Bolts. The undercut flat head sits lower than a standard 82° flat, making room for thicker sheet metal or brittle plastics without punching through. A Type 23 triangular chip-relief pocket at the tip clears swarf as it cuts—reducing drive torque and leaving crisp internal threads in steel, aluminum, and other ductile materials.
The bright zinc-bake finish delivers classic corrosion protection and hydrogen-relief baking to guard against embrittlement—fully RoHS compliant. Choose ½″ or ⅝″ fully-threaded lengths, all backed by fast U.S. shipping and Monster Bolts’ renowned support.
Monster Features:
- Undercut Flat Head: Shallow countersink profile maximizes thread engagement in thin sheet.
- Type 23 Cutting Point: Triangular chip-relief slot ejects chips for smoother cutting and lower drive torque.
- Phillips Drive: #3 Phillips recess provides reliable, cam-out-resistant engagement.
- Zinc-Bake Finish: Bright zinc plating with post-plate bake—classic look, RoHS compliant, reduced hydrogen embrittlement.
- Quality You Trust: Tight tolerances and batch inspection to Monster Bolts’ exacting standards.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | 1/4-20 UNC |
| Available Lengths | 1/2″ & 5/8″ (full thread) |
| Head / Drive | Phillips Flat Undercut — #3 Phillips |
| Point Style | Type 23 (triangular chip-relief cutout) |
| 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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