The Secret Of Bulk 1/4″-20 Phillips Flat-undercut Thread-cutting Screws — Type F, Bright-zinc Steel Set [nBTYl7ct]

Monster Overview:

When a standard 82 ° flat head is too tall for thin sheet-metal or shallow countersinks, step up to 1/4″-20 Phillips Flat-Undercut Thread-Cutting Screws. The undercut design removes roughly 70 % of the head cone, letting you maintain full thread length without losing flush seating. Heat-treated carbon steel receives a brilliant bright-zinc electro-plate, is hydrogen-relief baked to IFI specs, and finished with a factory dry-wax film for reliably low drive torque. A Type F fluted point taps clean female threads in a pre-drilled or punched hole; chips clear through the flute—no nut required.

Monster Features:

• Undercut Head Advantage: Shallow 82 ° countersunk head allows use in sheet down to 0.050″ while preserving maximum thread engagement.
• Flush Seating & Drive: Phillips #3 recess provides high torque with minimal cam-out.
• Type F Cutting Point: UNC machine thread with fluted slot—forms threads in 0.050–0.200″ steel plate or dense hardwood; chips exit cleanly.
• Bright-Zinc Finish: RoHS-compliant plating, hydrogen-relief baked, topped with factory dry-wax for consistent clamp load.
• Material: Heat-treated carbon steel delivers outstanding tensile & shear strength.
• Bulk Packaging: Sealed master cartons—ideal for HVAC skins, trailer decks & OEM fabrication where thin sheet and flush fit meet.

Monster Specifications:

• Diameter / Thread: 1/4″-20 UNC — Type F cutting point (fully threaded)
• Head Style: 82 ° flat-undercut countersunk, Phillips drive
• Drive Size: Phillips #3
• Material: Heat-treated carbon steel
• Finish & Lube: Bright-zinc plated, hydrogen-relief baked & factory dry-waxed
• Standards: SAE J476 Type F / IFI 136

More Monster Bolts:

• Browse the complete Type F thread-cutting lineup
• Need thread-formers? Visit our PT / Plastite collection

Order Yours Today & Feel the Monster Bolts Difference!

Every bulk carton ships fast from our U.S. warehouse and is backed by Monster Bolts’ quality guarantee and responsive support.