Description
Monster Overview:
Bulk #4-40 Slotted Hex-Washer Taptite Alternative Thread-Rolling Screws pack dual-drive convenience into a miniature fastener—spin them fast with a 1/4″ nut-driver or use a flat-blade screwdriver in tight spots. The trilobular shank roll-forms robust, reusable threads in untapped holes, saving 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 drive torque. Perfect for electronics enclosures, appliance sub-assemblies, HVAC sheet-metal, and any build that needs a flange head with a backup slot for service work.
Monster Features:
- Combo Slot + Hex Drive: Choose the tool that’s handy—great for field repairs and tight quarters.
- 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 miniature joints tight.
- Smoother Installs: Trilobular profile plus wax top-coat reduce friction for faster runs.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | #4-40 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 delivers 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 #4 washers available here.
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Note: (PT) denotes partial-thread fasteners; this listing is full-thread.