Description
Monster Overview:
Bulk 5/16-18 Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws from Monster Bolts pair a high-torque hex drive with an integrated washer that spreads load and protects finishes. Their trilobular body roll-forms tough, reusable threads in untapped holes—cutting assembly time while delivering outstanding vibration resistance in aluminum, mild steel, brass, and plastics.
The bright zinc bake & wax finish supplies lubricity for lower drive torque plus RoHS-compliant corrosion protection. Perfect for HVAC frames, vehicle panels, equipment housings, and general-fabrication builds that demand a strong flange-style head.
Monster Features:
- Thread-Rolling Efficiency: Forms internal threads in one step—no taps, chips, or secondary ops.
- Indented Hex-Washer Head: High-torque hex drive with integrated washer (flange hex) spreads load.
- Vibration Resistance: Interference fit & work-hardened threads keep joints tight under dynamic loads.
- Lower Drive Torque: Trilobular profile and wax top-coat cut friction for faster installs.
- Quality First: Monster Bolts supplies only premium fasteners—backed by responsive support.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | 5/16-18 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 |
Commonly 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 5/16″ washers available here.
Order Yours Today and Experience the Monster Bolts Difference!
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.