Product Description
No.8 4.2mm A4 Stainless Steel Countersunk Pozi Self Tapping Screws – DIN 7982
No.8 countersunk Pozi self tapping screws manufactured from A4 marine grade stainless steel. With a nominal 4.2mm thread diameter, these screws provide a corrosion-resistant fastening for suitable pre-drilled materials.
The countersunk head sits flush with the surface when installed in a matching countersink. A PZ2 Pozidriv screwdriver or bit provides the correct drive fit.
Technical Specifications
| Screw gauge | No.8 |
|---|---|
| Nominal thread diameter | 4.2mm – ST4.2 |
| Material | A4 marine grade stainless steel |
| Head style | Flat countersunk |
| Drive type | Pozi / Pozidriv |
| Drive size | PZ2 |
| Head diameter | 7.74–8.10mm |
| Maximum head height | 2.50mm |
| Thread type | Self tapping |
| Point style | Pointed AB / Form C |
| Dimensional standard | DIN 7982 |
| Length measurement | Overall length, including the countersunk head |
Available Lengths
13mm, 16mm, 19mm, 25mm, 32mm, 38mm and 50mm.
Sizes are expressed as nominal thread diameter x overall length. For example, a 4.2mm x 25mm screw measures 25mm from the top of the countersunk head to the tip.
Key Features
- A4 stainless steel for enhanced corrosion resistance.
- Countersunk head for a flush finish in a prepared countersink.
- PZ2 Pozidriv drive.
- Pointed self tapping thread for suitable pre-drilled materials.
- Suitable for marine fittings, outdoor assemblies, maintenance and repair applications where A4 stainless steel is appropriate.
Selection and Installation
Select the length to suit the material thickness and required thread engagement. Prepare a pilot hole appropriate to the material type and thickness, together with a countersink that matches the screw head.
Use a correctly fitting PZ2 screwdriver or bit and tighten carefully to avoid stripping the receiving material or damaging the drive recess. These screws require a prepared hole; they do not have a self-drilling point.
Pack Quantities
Available in quantities of 5, 10, 20, 50, 100, 250, 500 and 1,000. Select the required length and quantity from the options.
Standards and References
- DIN 7982 – cross-recessed countersunk head self tapping screws.
- Form C – pointed end.
- Recess type Z – Pozidriv drive.
