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The Unifix Steel Shouldered Thumbscrews BZP M6 x 15 are essential hardware for DIY enthusiasts and professionals seeking a secure, tool-free fastening solution for wood, metal, or plastic projects. These screws offer the key benefit of a specialized shoulder design that ensures a firm grip and prevents slippage during manual installation, though users should note they are specifically sized for M6 threads and may not fit standard non-threaded holes without appropriate pilot work.
| Colour | Silver |
|---|---|
| Model Part Number | 1263346 |
| Brand | Unifix |
No, these screws are designed for M6 threaded inserts. They will not hold securely in plain, non-threaded holes.
BZP stands for Bright Zinc Plated, which is a finish applied to the steel to provide corrosion resistance.
No, the 15mm measurement refers to the length of the threaded portion of the screw.
While the BZP finish offers some protection, they are not specifically rated for constant marine or saltwater exposure.
While they are intended for manual, tool-free operation, using tools can damage the knurled finish on the shoulder; hand-tightening is recommended.
Check that the thread pitch matches your M6 insert and ensure there is no debris inside the threaded hole.
Consider using a rubber washer to increase friction or ensure the shoulder is seated firmly against the mounting surface.
Installation is straightforward: ensure your target hole or insert is internally threaded to M6 specifications. Do not force the screw if resistance is met, as this may cross-thread the component. To maintain the Bright Zinc Plated finish, avoid using harsh abrasive cleaners or acidic chemicals that could strip the protective layer. If the screws are used in outdoor or high-moisture environments, periodically check for surface oxidation and apply a light machine oil if necessary to preserve their functionality.
