Description
Monster Overview:
Perfect for trailer floors, steel framing, dock builds and timber-to-steel assemblies, these 1/4″-20 Unslotted Indent Hex-Washer Serrated Thread-Cutting Screws combine fast installation with vibration-proof clamping. Heat-treated carbon steel carries a bright zinc electro-plate, is hydrogen-relief baked and factory dry-waxed for consistently low seating torque. Radial serrations under the captive washer bite into steel or wood to resist loosening, while the Type F fluted point taps clean female threads in a pre-drilled or punched hole; chips clear through the flute—no nut required.
Monster Features:
- Serrated Bearing Face: 360° teeth lock the joint against shock & vibration.
- Head / Drive: Unslotted indent hex-washer (⅜″ AF) — smooth forge; captive washer spreads load.
- Type F Cutting Point: UNC machine thread with fluted slot — forms internal threads in 0.050–0.200″ steel plate or dense hardwood.
- Finish: Bright-zinc (RoHS) + light oil, baked, topped with factory dry-wax for repeatable clamp load.
- Material: Heat-treated carbon steel for high tensile and shear strength.
- Bulk Packaging: Sealed master cartons — ideal for OEM steel fabrication, trailer shops & dock builders.
Monster Specifications:
- Diameter / Thread: 1/4″-20 UNC, Type F cutting point
- Head Style: Unslotted serrated indent hex-washer (integral flange)
- Drive Size: ⅜″ hex
- Material: Heat-treated carbon steel
- Finish: Bright-zinc — baked & factory wax-lubed
- Cross-Reference: SAE J476 Type F / IFI 136
More Monster Bolts:
• Need other serrated Type F sizes?
• Looking for PT / Plastite screws? Explore the full inch-series lineup.
Order Yours Today & Feel the Monster Bolts Difference!
Every bulk carton ships fast from our U.S. warehouse and is backed by Monster Bolts’ quality guarantee and responsive support.