Description
Monster Overview:
Bulk 1/4-20 Slotted Hex-Washer Taptite Alternative Thread-Rolling Screws give you dual-drive versatility—zip them in with a 3/8″ nut-driver or back them out later with a flat-blade screwdriver. Their trilobular shank roll-forms durable, reusable threads in untapped holes, cutting assembly time while resisting vibration in aluminum, mild steel, brass, and plastics.
The bright, low-friction zinc bake & wax finish delivers RoHS-compliant corrosion protection plus easier driving torque. Perfect for HVAC frames, appliance housings, truck panels, and general fabrication that needs a flange-style head with a backup slot for field service.
Monster Features:
- Combo Slot + Hex Drive: Two tool options (slot or hex) for maximum job-site flexibility.
- Integrated Washer Flange: Indented hex-washer spreads load—no loose washers to track.
- Thread-Rolling Efficiency: Forms internal threads in one pass—no taps, chips, or cleanup.
- Vibration Resistance: Interference fit & work-hardened threads keep joints tight.
- Smoother Installs: Trilobular profile + wax top-coat reduce friction for faster runs.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | 1/4-20 UNC |
| Available Lengths | Fully threaded — select length above |
| Head / Drive | Slotted Indented Hex-Washer (combo slot-hex) |
| Point Style | Taptite-style trilobular thread-rolling |
| Material | Carbon Steel |
| Finish | Zinc Bake & Wax (RoHS) |
| System of Measurement | US / Inch |
| Standards | Meets ASME B18.6.3 & IFI thread-rolling guidelines |
Also called slotted hex-washer, indented hex-slot, or combo slot-hex screws, this head style offers high torque with a backup flat slot—no separate washer required.
More Monster Bolts:
Explore more thread-forming options: Need other sizes or head styles? Browse our full Thread-Forming Screw Collection.
Need matching hardware? Bulk 1/4″ washers available here.
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Note: (PT) denotes partial-thread fasteners; this listing is full-thread.