Description
Monster Overview:
Bulk 5/16-18 Slotted Indented Hex-Washer Head Taptite Alternative Thread-Rolling Screws from Monster Bolts give you dual-drive flexibility—zip them in with a 1/2″ nut-driver for speed or a flat-blade screwdriver when power tools aren’t handy. Their trilobular body roll-forms reusable threads in untapped steel, aluminum, and plastics, saving production time while locking tight against vibration.
A bright zinc bake & wax finish supplies lubricity for lower drive torque and RoHS-compliant corrosion protection. Perfect for HVAC frames, equipment housings, truck panels, and other sheet-metal fabrications that need a rugged flange head with a back-up slot.
Monster Features:
- Combo Slot + Hex Drive: Two tool options (slot or hex) for field-service versatility.
- Integrated Washer Flange: Indented hex-washer head spreads load—no loose washer needed.
- Thread-Rolling Efficiency: Forms threads in one pass—no taps, chips, or secondary ops.
- Vibration Resistance: Interference fit & work-hardened threads keep joints tight.
- Smoother Installs: Trilobular profile and wax top-coat cut friction for faster, lower-torque runs.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Thread | 5/16-18 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 5/16″ washers available here.
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Note: (PT) denotes partial-thread fasteners; this listing is full-thread.