Best current price£8.95from OnBuy.com
Shopping.co.uk recommended and popular offers
OnBuy.com£8.95Visit shop Unifix A2-304 Self-Tapping Screws 6G X 3/8" - Q207981f00350009000 - Box Of 1000 5014196718651
Visit shop
The Range£10.32Visit shop Unifix A2-304 Self-Tapping Screws 6G X 3/8" - Q207981f00350009000 - Box Of 1000 - Grey
Visit shop5 offers from £8.95 - £11.75
View price history by clicking the chart icon.
The Unifix A2-304 Self-Tapping Screws (6G x 3/8 inch) are designed for contractors, woodworkers, and DIY enthusiasts who require a reliable fastening solution for wood and metal applications. These screws offer the primary benefit of high-grade corrosion resistance and easy installation due to their precision-engineered self-tapping threads; however, users should note that they are specifically sized for thinner materials, making them less suitable for heavy-duty structural framing.
| Colour | Grey |
|---|---|
| Model Part Number | Q207981F00350009000 |
| Brand | Unifix |
While A2-304 stainless steel is generally considered non-magnetic, some residual magnetism can occur due to the cold-working process during manufacturing.
These are suitable for light outdoor use in standard environments; however, for coastal areas, A4 grade stainless steel is recommended.
6G refers to the gauge or diameter of the screw, which is 3.5mm.
Yes, a pilot hole is highly recommended for both metal and hardwood to ensure a clean finish and to prevent the material from cracking.
Pozi drive heads have additional small slots that allow for a better fit with a Pozi bit, reducing the chance of the bit slipping out during high torque application.
While technically possible, self-tapping screws are designed for a single installation to ensure a secure thread grip; re-driving them may cause the hole to become loose.
Ensure you are using a Pozi bit instead of a Phillips bit, and check that the driver is perfectly aligned with the screw head.
Check that the pilot hole is the correct size; for self-tapping screws, the pilot hole should be slightly smaller than the core diameter of the screw.
Verify that you are not exceeding the recommended torque for a 6G diameter screw, especially when working with hardwoods or dense metals.
For the best results, use a high-quality Pozi drive bit rather than a standard Phillips bit to prevent stripping the head. Ensure that the surface material is thick enough to accommodate the 3.5mm diameter of the screw to avoid splitting. To maintain the life of the stainless steel, avoid using these screws in high-salinity coastal areas where extreme chloride exposure might necessitate higher grade A4 (316) steel. Store the remaining screws in a cool, dry place within their original container to prevent damage to the threads.
