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The Range£4.85Visit shop Unifix Machine Screws Slotted Raised Csk Head Nickel Plated M3.5 X 40 - Grey
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The Unifix A2-304 Self-Tapping Screws are designed for DIY enthusiasts and professionals seeking a reliable, corrosion-resistant fastening solution for wood and metal projects. Featuring a durable A2-304 stainless steel construction and a Pozi countersunk head, these screws provide excellent torque and a flush finish, though users should ensure they have the correct Pozi drive bit to prevent cam-out during installation.
| Colour | Silver |
|---|---|
| Model Part Number | Q207982C00350038000 |
| Brand | Unifix |
While A2-304 stainless steel is highly resistant to corrosion, it is generally recommended to use A4-grade stainless steel for direct salt-water exposure.
For softwoods, you may not need to pre-drill, but for hardwoods, a pilot hole is highly recommended to prevent splitting the wood.
6G refers to the gauge or diameter of the screw shank, which in this case is 3.5mm.
A2-304 stainless steel is generally considered non-magnetic, though minor magnetism may be present due to the cold-working process during manufacturing.
Yes, each pack is professionally counted to contain 1000 units.
Ensure you are using the correct size Pozi drive bit and check that the pilot hole is appropriately sized for the material.
Verify that the material is correctly countersunk using a countersink bit before driving the screw.
The metal may be too hard or thick; use a larger diameter pilot hole or switch to a hardened metal screw.
For best results, use a high-quality Pozi (PZ) drive bit that matches the screw head size exactly to ensure maximum contact. When installing in metal, ensure the material thickness is appropriate for the screw length; if the metal is too thick, pre-drilling is mandatory to avoid snapping the screw shank. To maintain the integrity of the stainless steel, avoid using carbon steel tools on the screw head, as cross-contamination can lead to surface rust. If storing these screws, keep them in their original packaging in a dry area to prevent debris buildup in the threads.
