Description
Monster Overview:
Bulk #4-40 Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws from Monster Bolts unite a compact high-torque hex drive with an integrated washer that spreads load and safeguards finishes. Forged from hardened 410 stainless steel (martensitic, magnetic), these trilobular fasteners roll-form robust, reusable threads in untapped holes—cutting assembly time while supplying exceptional strength and vibration resistance in aluminum, mild steel, brass, and plastics.
The alloy is passivated & wax-coated for a pristine surface, added lubricity, and RoHS-compliant corrosion protection. Perfect for electronics enclosures, appliance sub-assemblies, HVAC sheet-metal, and other builds demanding stainless durability plus a secure flange-style head in a miniature size.
Monster Features:
- High-Strength 410 SS: Heat-treated martensitic stainless outperforms 18-8 in hardness.
- Thread-Rolling Efficiency: Creates internal threads in one step—no taps, chips, or secondary operations.
- Indented Hex-Washer Head: Hex-washer (flange-hex) drive spreads load without a separate washer.
- Vibration Resistance: Interference fit & work-hardened threads keep joints tight.
- Smoother Installs: Trilobular profile plus wax top-coat reduce friction for lower drive torque.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | #4-40 UNC |
| Available Lengths | Fully threaded — select length above |
| Head / Drive | Indented Hex-Washer (flange-hex) |
| Point Style | Taptite-style trilobular thread-rolling |
| Material | 410 Stainless Steel (martensitic, magnetic) |
| Finish | Passivated + Wax (RoHS) |
| System of Measurement | US / Inch |
| Standards | Meets ASME B18.6.3 & IFI thread-rolling screw guidelines |
Also called hex-washer head, indented-hex screw, or flange-hex screw, this drive style supplies high torque with a built-in washer—no separate hardware 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.