Description
Monster Overview
1/4″-20 Slotted Hex-Washer Thread-Cutting Screws give you bolt-strength clamp force without a backing nut—ideal for marine panels, food-grade machinery, trailer skins, HVAC cabinets and dense hardwood-to-steel joins. Forged from corrosion-proof 18-8 stainless steel, then passivated and coated with a factory dry-wax film for predictably low seating torque. The indented hex head with integral washer spreads load and covers oversize holes, while a broad flat-blade slot provides a back-up drive when a socket can’t fit. A Type F fluted point taps clean internal threads in a pre-drilled or punched hole; chips exit through the flute—no welds, no chip clean-up.
Monster Features
- Dual-Drive Head: Indented 1/4″ hex (3/8″ wrench) plus wide slot—socket, impact gun or flat driver.
- 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 Edge: 18-8 stainless offers excellent corrosion resistance—ideal for outdoor, marine and food-service environments.
- Finish & Lube: Passivated surface + factory dry-wax (silicone-free) for consistent clamp load.
- Bulk Packaging: Factory-sealed master cartons—perfect for stainless fabrication, dock builders & trailer shops.
Monster Specifications
- Diameter / Thread: 1/4″-20 UNC — Type F cutting point (fully threaded)
- Head Style: Slotted indented hex-washer (3/8″ wrench)
- Drive Methods: External hex • flat-blade screwdriver
- Material: 18-8 stainless steel, passivated
- Lubricant: 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 Difference!
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