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OnBuy.com£8.95Visit shop Unifix A2-304 St/St Self-Tapping Screws 10G X 1.1/4" - Q207981c00480032000 5014196318714
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B&Q£10.57Visit shop B&Q - A2-304 St/st Self-Tapping Screws 4G X 1/2" (2.9 X 13mm)Q207981C00290013000Perfect For Diy ProjectsBox Of 1000
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The Unifix A2-304 Stainless Steel Self-Tapping Screws (6G x 3/8") are engineered for professionals and DIY enthusiasts requiring reliable, corrosion-resistant fastening in thin metal or wood. Their primary benefit is the self-tapping design which eliminates the need for pre-drilling in many applications, significantly speeding up assembly times. While these screws offer exceptional durability, users should note that the A2-304 stainless steel is designed for general exterior use and may not be suitable for highly acidic or marine environments compared to A4-316 grade hardware.
| Colour | Silver |
|---|---|
| Model Part Number | Q207981C00350009000 |
| Brand | Unifix |
Yes, A2-304 stainless steel is suitable for general outdoor environments, though it is recommended to avoid high-salinity or coastal areas where A4-316 stainless is preferred.
For thin sheet metal, a pilot hole is often not required. For thicker metal or dense wood, a small pilot hole is recommended for easier installation.
Pozi drives have extra 'finer' lines between the main slots, allowing for better grip and torque; standard Phillips drivers will not fit securely and may strip the head.
6G refers to the gauge or diameter of the screw. A 6G screw is approximately 3.5mm in diameter.
A2-304 stainless steel is generally non-magnetic in its raw state, but the forming process of creating the screw head and threads can induce slight magnetism.
The pilot hole may be too large. Use a smaller drill bit or increase pressure while starting the drive.
Verify that you are using a PZ-size bit rather than a PH (Phillips) bit. Adjust the clutch setting on your drill.
This often occurs in very hard materials. Pre-drill a larger pilot hole or use a lubricant on the screw threads.
For installation, ensure you are using a genuine Pozidriv bit (marked with a PZ symbol), as using a standard Phillips bit can cause cam-out and damage the screw head. If you are working with thicker gauge metal, it is standard practice to drill a small pilot hole that is slightly smaller than the minor diameter of the screw to ensure the self-tapping threads engage correctly without excessive force.
Care involves keeping the screws in a dry, low-humidity environment to maintain their finish. While the A2-304 steel is resistant to oxidation, it should still be kept away from harsh chemicals or abrasive cleaners that could compromise the surface passivation layer.
