4mm x 25mm Pozi Countersunk Screw for Hard Plastics (PT45) - PZ2 Drive | BZP Steel
| Quantity |
Unit Price
(ex. VAT)
|
Unit Price
(inc. VAT)
|
|---|---|---|
| 1 - 49 | £0.32 | £0.38 |
| 50 - 99 | £0.19 | £0.23 |
| 100 - 249 | £0.12 | £0.15 |
| 250 - 499 | £0.09 | £0.11 |
| 500 - 999 | £0.07 | £0.09 |
| 1000 - 4999 | £0.07 | £0.08 |
| 5000 + | £0.05 | £0.06 |
£0.38 / each
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Product Specification
| Thread Size | 4.0mm |
| Thread Length | 25mm |
| Material | Steel BZP |
| Head Diameter | 7.35mm |
| Head Height | 1.90mm |
| Drive | PZ2 |
| Head Style | Countersunk |
Frequently Bought Together
Total Price: £0.00
4mm x 25mm Pozi Countersunk PT45 Screw for Hard Plastics | Bright Zinc Plated Steel
Designed for engineering plastics used in manufactured assemblies, this 4mm x 25mm Pozi Countersunk PT45 Screw uses a 45° trilobular thread form developed for harder plastics and reinforced materials. The Bright Zinc Plated Steel fastener combines a Countersunk head with a PZ2 Pozi drive so the fixing can sit flush in a correctly prepared countersunk hole.
What Are Pozi Countersunk PT45 Screws?
Pozi Countersunk PT45 screws are designed for moulded or predrilled pilot holes in harder plastics and reinforced materials. The Pozi recess provides a familiar drive format while the countersunk head is useful where a flush or low-profile finish is required.
Common Applications
- Appliance Housings: Provides a dedicated fastening method for rigid plastic covers and moulded appliance parts.
- Lighting Products: Secures rigid plastic bezels, covers and housings where a flush finished face is useful.
- Polycarbonate Housings: Forms a secure thread in suitable polycarbonate covers and housings while allowing a flush head finish.
- Automotive Components: Fastens rigid plastic trim and moulded components where a low-profile screw head is beneficial.
4mm x 25mm Pozi Countersunk PT45 Screw Dimensions
- Thread Size: 4.0mm
- Thread Length: 25mm
- Head Diameter: 7.35mm
- Head Height: 1.90mm
- Drive: PZ2
- Material: Steel BZP
- Head Style: Countersunk
Key Benefits
- PT45 geometry provides a strong drive-to-strip ratio for compatible hard-plastic assemblies.
- Correct pilot-hole diameter, boss size and countersink geometry should be selected for the material being assembled.
- 4mm thread size and 25mm thread length provide the primary fastening dimensions.
- Trilobular geometry concentrates thread-forming pressure at three points rather than around a fully round profile.
Compare other sizes in the Vital Parts Pozi Countersunk PT45 Screw range. Our Engineering Guide to Screws for Plastic explains PT45 trilobular threads, pilot holes and boss sizing in more detail. For product selection support, speak with our team on 01233 713581.
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