Description

Monster Overview:
Tackle heavy-duty plastic assemblies with 5/16″-9 × 1 ¼″ Slotted Indent Hex-Washer Head PT 48-2 Thread-Forming Screws. The forged top slot lets you start or finish by screwdriver if a socket can’t reach, while the captive washer hex head flies through production with a 7/16″ nut-runner. The Plastite-alternative tri-lobular thread cold-flows thermoplastic, cutting chip-free internal threads—no pre-tapping, no cleanup. Heat-treated carbon-steel screws are bright-zinc plated, hydrogen-relief baked, then factory wax-lubed for repeatable low drive torque.
Monster Features:
- Head / Drive: Slotted indent hex-washer (7/16″ AF) — drive by socket or flat blade; slot is inspection-friendly and won’t clog thanks to top indent.
- Captive Washer Face: Spreads load and eliminates the need for a separate washer on plastics.
- PT 48-2 Geometry: Plastite-alt. flank maximises pull-out in ABS, nylon, polycarbonate & more.
- Finish: Bright zinc for corrosion protection, baked for hydrogen relief, dry wax for consistent seating torque.
- Bulk Packaging: Supplied in sealed master cartons—ideal for HVAC, appliance & industrial enclosure lines.
Monster Specifications:
- Diameter: 5/16″ (0.312 in.)
- Thread: PT 48-2 tri-lobular (functional ≈ 9 TPI)
- Length: 1 ¼″ (1.250 in.) – fully threaded
- Head Style: Slotted indent hex-washer (captive washer)
- Drive Size: 7/16″ hex & screwdriver slot
- Material: Heat-treated carbon steel
- Finish: Bright zinc – baked & factory wax-lubed
- Cross-Reference: Plastite® 48-2 / EJOT PT (non-OEM)
More Monster Bolts:
• Need bulk Taptite-style thread-rolling screws?
• Looking for Type 1, 23, 25 & F thread-cutting screws?
Explore our full inch-series lineup.
Order Yours Today & Experience the Monster Bolts Difference!
Every bulk carton ships fast from our U.S. warehouse and is backed by Monster Bolts’ quality guarantee and responsive support.