Bulk #4-40 Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws from Monster Bolts pair a compact high-torque hex drive with an integrated washer that spreads load and protects finishes. The trilobular body roll-forms durable, reusable threads in untapped holesslashing assembly time while delivering excellent vibration resistance in aluminum, mild steel, brass, and plastics.
A bright zinc bake & wax finish adds lubricity for lower drive torque plus RoHS-compliant corrosion protection. Ideal for electronics enclosures, appliance sub-assemblies, HVAC sheet-metal, and precision equipment that need a secure flange-style head in a small size.
| 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 | Carbon Steel |
| Finish | Zinc Bake & Wax (RoHS) |
| System of Measurement | US / Inch |
| Standards | Meets ASME B18.6.3 & IFI thread-rolling screw guidelines |
Often called hex-washer head, indented hex screw, or flange-hex screw, this drive style supplies high torque with a built-in washerno separate hardware required.
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.
Buy with confidence! Every order from Monster Bolts is backed by our commitment to quality, fast shipping, and customer satisfaction.
Note: (PT) denotes partial-thread fasteners; all lengths in this listing are full-thread.