Description
Monster Overview:
Engineered for trailer frames, marine fixtures, food-equipment skins and hardwood-to-steel assemblies, these 1/4″-20 Slotted Hex-Washer Thread-Cutting Screws deliver bolt-strength clamp loads— no backing nut required. Forged from 410 martensitic stainless steel, they are heat-treated to Rockwell C38-45 for abrasion resistance yet retain stainless corrosion protection. The indented hex head with integral washer spreads load and covers oversize holes, while the wide flat-blade slot offers a backup drive where a socket can’t reach. Each screw is passivated for added rust resistance and finished with a factory dry-wax film for predictably low 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 welds, no nut.
Monster Features:
- Dual-Drive Head: Indented 1/4″ hex (3/8″ wrench) plus broad slot—drive with socket, impact gun or flat screwdriver.
- Integrated Washer: Enlarged bearing surface resists pull-through and helps seal joints in thin sheet.
- 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.
- Material Advantage: 410 stainless is magnetic, heat-hardened and offers better wear & strength than 18-8 while retaining corrosion resistance.
- Finish & Lube: Passivated surface + factory dry-wax (silicone-free) for consistent clamp load.
- Bulk Packaging: Factory-sealed cartons—ideal for OEM fabrication, dock builders & stainless construction projects.
Monster Specifications:
- Diameter / Thread: 1/4″-20 UNC — Type F cutting point (fully threaded)
- Lengths Offered: ¾″ (0.750 in.) & 1″ (1.000 in.)
- Head Style: Slotted indented hex-washer (3/8″ wrench)
- Drive Methods: External hex • flat-blade screwdriver
- Material: 410 heat-treated stainless steel (Rc 38-45)
- Finish & Lube: Passivated • factory dry-wax film
- Standards: SAE J476 Type F • IFI 136
More Monster Bolts:
• Browse the complete
Type F thread-cutting lineup
• Need thread-formers? Explore 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 the Monster Bolts quality guarantee and responsive support.