Description
Monster Overview:
Bulk 1/4-20 Slotted Hex-Washer Taptite Alternative Thread-Rolling Screws blend dual-drive convenience with the corrosion resistance of austenitic 18-8 stainless steel. Zip them in with a 3/8″ nut-driver or service them later using a flat-blade screwdriver. Their trilobular shank roll-forms tough, reusable threads in untapped holes—cutting assembly time while resisting vibration in aluminum, mild steel, brass, and plastics.
The screws are passivated & wax-coated for a clean surface, added lubricity, and RoHS-compliant protection. Perfect for marine hardware, outdoor enclosures, food-service equipment, and any build that needs a stainless flange head with a back-up slot for field service.
Monster Features:
- Corrosion-Resistant 18-8 SS: Classic austenitic stainless resists rust in most environments.
- Combo Slot + Hex Drive: Two tool options (slot or hex) for maximum job-site flexibility.
- Integrated Washer Flange: Indented hex-washer head spreads load—no loose washer.
- Thread-Rolling Efficiency: Forms internal threads in one pass—no taps, chips, or cleanup.
- Vibration Resistance: Interference fit & work-hardened threads keep joints tight.
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 | 18-8 Stainless Steel (A2, non-magnetic) |
| Finish | Passivated + 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 supplies 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.