Description
Monster Overview
When high clamp load and mild vibration resistance are mission-critical, reach for 5/16″-18 Slotted Serrated Hex-Washer Thread-Cutting Screws. A toothed flange locks the head to the work surface, eliminating the need for a separate lock-washer, while the integral washer distributes load on thin plate. Heat-treated carbon steel is finished in brilliant bright-zinc plating, hydrogen-relief baked to IFI spec, then factory dry-waxed for ultra-smooth, repeatable seating torque. The Type F fluted point taps clean female threads in a pre-drilled or punched hole; chips exit through the flute—no backing nut, no chip clean-up.
Monster Features
- Serrated Flange Head: Teeth bite the mating surface for mild vibration resistance; built-in washer spreads load—skip the extra hardware.
- Dual-Drive Convenience: Indented 5/16″ hex head (½″ wrench) plus broad slot—install with a socket, impact gun or flat driver.
- Type F Cutting Point: UNC machine thread with fluted slot—forms threads in 0.060–0.200″ 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 outstanding tensile & shear strength for structural applications.
- Bulk Packaging: Factory-sealed master cartons—ideal for trailer builders, dock manufacturers & heavy-steel fabricators.
Monster Specifications
- Diameter / Thread: 5/16″-18 UNC — Type F cutting point (fully threaded)
- Head Style: Slotted, serrated indented hex-washer (½″ 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 out 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.