Description
Monster Overview:
Fix your project right the first time with M3.5-1.57 Round-Washer-Head 6-Lobe PT Alternative Thread-Rolling Screws in A2 / 18-8 stainless steel from Monster Bolts. Their 30° trilobular profile cold-flows thermoplastic bosses, creating chip-free, vibration-resistant threads, while corrosion-proof stainless construction stands up to moisture and mild chemicals.
Monster Features
- Round-Washer Head: Integrated flange spreads load to prevent pull-through.
- 6-Lobe Drive: Star / Torx® / hexalobular recess (T15) delivers high torque with minimal cam-out.
- 30° PT Trilobular Thread: 1.57 mm pitch forms strong internal threads at lower drive torque.
- A2 Stainless Steel: Rust-proof 18-8 alloy for outdoor and medical-grade applications.
- Passivated & Wax-Lubricated: Clean, bright finish plus factory wax for smooth installation (RoHS compliant).
- Full Thread: Fully threaded shank grips plastics of any thickness.
Monster Specifications
| Feature | Details |
|---|---|
| Diameter / Pitch | M3.5 × 1.57 mm (PT trilobular, 30°) |
| Available Lengths | 6 mm – 25 mm (fully threaded) |
| Head / Drive | Round-Washer Head / T15 6-Lobe |
| Thread Form | PT Alternative, 30° trilobular thread-rolling |
| Material | A2 / 18-8 Stainless Steel |
| Finish | Passivated & Wax-Lubricated (RoHS) |
| System of Measurement | Metric |
| Standards / Reference | Plastite® / PT 30° design guidelines (Ref.) |
More Monster Bolts
Need carbon-steel versions or other sizes? Explore our full Metric PT-Style Screw collection .
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