Description
Monster Overview
Need clamp force, washer coverage and vibration grip in one fastener? Our 1/4″-20 Slotted Serrated Hex-Washer Thread-Cutting Screws do it all—ideal for trailer frames, dock plates, heavy-gauge steel, truck bodies and hardwood-to-steel builds. Teeth under the flange dig into the mating surface for mild vibration resistance, while the built-in washer spreads load—so you can skip separate lock-washers and nuts. Heat-treated carbon steel sports a brilliant bright-zinc finish, is hydrogen-relief baked to IFI spec and factory dry-waxed for smooth, repeatable seating torque.
Monster Features
- Serrated Flange Head: Bites the work surface to resist loosening; wide washer surface prevents pull-through.
- Dual-Drive Convenience: Indented 1/4″ hex head (3/8″ wrench) plus broad slot—install with a socket, impact gun or flat driver.
- Type F Cutting Point: UNC machine thread with fluted slot—taps threads in 0.050–0.200″ steel plate or dense hardwood; chips exit cleanly.
- Bright-Zinc Finish: RoHS-compliant plating, hydrogen-relief baked, factory dry-waxed for corrosion protection and consistent clamp load.
- Material: Heat-treated carbon steel delivers high tensile and shear strength.
- Bulk Packaging: Factory-sealed master cartons—perfect for structural-steel shops, trailer builders & dock manufacturers.
Monster Specifications
- Diameter / Thread: 1/4″-20 UNC — Type F cutting point (fully threaded)
- Head Style: Slotted serrated indented hex-washer (3/8″ wrench)
- Drive Methods: External hex • flat-blade screwdriver
- 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 full Type F thread-cutting collection
• Need thread-formers? Check our PT / Plastite lineup
Order Yours Today & Feel the Monster Difference!
Every bulk carton ships fast from our U.S. warehouse and is backed by the Monster Bolts quality guarantee and responsive support.