4mm x 20mm Torx Countersunk Screw for Hard Plastics (PT45) - T15 Drive | A2 Stainless Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 49 | £0.73 | £0.88 |
| 50 - 99 | £0.44 | £0.53 |
| 100 - 249 | £0.29 | £0.35 |
| 250 - 499 | £0.22 | £0.26 |
| 500 - 999 | £0.18 | £0.22 |
| 1000 - 4999 | £0.15 | £0.18 |
| 5000 + | £0.11 | £0.13 |
£0.88 / each
.png)
Product Specification
| Thread Size | 4.0mm |
| Thread Length | 20mm |
| Material | A2 Stainless Steel |
| Head Diameter | 7.35mm |
| Head Height | 1.90mm |
| Drive | T15 |
| Head Style | Countersunk |
Frequently Bought Together
Total Price: £0.00
4mm x 20mm Torx Countersunk PT45 Screw for Hard Plastics | A2 Stainless Steel
Built for engineering plastics used in manufactured assemblies, this 4mm x 20mm PT45 Screw uses A2 Stainless Steel, a T15 Torx drive and a Countersunk head. The specialist thread form is designed for harder plastics where a strong drive-to-strip ratio and flush installation are useful.
What Are Torx Countersunk PT45 Screws?
A Torx Countersunk PT45 screw provides a middle ground between a sharp 30° plastic thread and a conventional self tapping screw. Its shorter 45° thread and trilobular form make it particularly useful where secure engagement, flush installation and a strong drive-to-strip ratio are required.
Common Applications
- Automotive Components: Fastens rigid plastic trim and moulded parts where a low-profile screw head and Torx drive are beneficial.
- Industrial Equipment: Fastens hard-plastic guards, covers and instrument housings on machinery and control equipment.
- Outdoor Equipment: Provides an A2 Stainless Steel fastening option for suitable exterior hard-plastic assemblies.
- Fibre-Reinforced Plastics: Provides a specialised thread-forming fastening option for compatible reinforced plastic parts.
4mm x 20mm Torx Countersunk PT45 Screw Dimensions
- Thread Size: 4.0mm
- Thread Length: 20mm
- Head Diameter: 7.35mm
- Head Height: 1.90mm
- Drive: T15
- Material: A2 Stainless Steel
- Head Style: Countersunk
Key Benefits
- Trilobular geometry concentrates thread-forming pressure at three points rather than around a fully round profile.
- A2 Stainless Steel construction provides improved corrosion resistance for suitable demanding environments.
- The engineering guide provides PT45 pilot-hole tables, boss-sizing guidance and thread-selection information.
- 45° trilobular PT45 thread form is designed for harder plastics and reinforced materials.
See related dimensions in the Torx Countersunk PT45 Screw range. If you are designing a hard-plastic boss, our Engineering Guide to Screws for Plastic covers pilot-hole ratios, boss sizing and PT45 tolerances. For help, call 01233 713581.
Fri 8.30 am - 3.30 pm
