Description
Monster Overview:
These 5/16″-18 Slotted Hex-Washer Thread-Cutting Screws deliver bolt-level clamp force in a single self-tapping part—ideal for trailer frames, dock decks, heavy-gauge sheet-metal, and hardwood-to-steel assemblies. The indented hex head with integral washer spreads load and seals oversize holes, while a deep flat-blade slot gives a back-up drive in tight quarters. Heat-treated carbon steel carries a brilliant bright-zinc electro-plate, is hydrogen-relief baked to IFI spec, and factory dry-waxed for smooth, repeatable seating torque. A Type F fluted point taps clean female threads in a pre-drilled or punched hole; chips exit through the flute—no chip clean-up, no backing nut.
Monster Features:
- Dual-Drive Convenience: Indented 5/16″ hex head (½″ wrench) plus broad slot—socket, impact gun or flat driver.
- Integrated Washer: Enlarged bearing surface resists pull-through and helps seal joints.
- 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 consistent clamp load.
- Material: Heat-treated carbon steel for outstanding tensile & shear strength.
- Bulk Packaging: Factory-sealed cartons—ideal for trailer shops, dock builders & structural-steel fabricators.
Monster Specifications:
- Diameter / Thread: 5/16″-18 UNC — Type F cutting point (fully threaded)
- Head Style: Slotted 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 complete Type F thread-cutting lineup
• Need thread-formers? Check our PT / Plastite collection
Order Yours Today & Feel the Monster Bolts Difference!
Every bulk carton ships quickly from our U.S. warehouse and is backed by Monster Bolts’ quality guarantee and responsive support.