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The Range£14.74Visit shop Unifix A4-316 St/St Hexagon Setscrews M8 X 25 - Q409330000800025000 - Grey
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The Unifix M10 x 100 Hexagon Setscrew is a high-grade fastening solution designed for professionals and DIY enthusiasts requiring superior corrosion resistance in demanding environments. Manufactured from A4-316 stainless steel, these screws offer exceptional durability for outdoor or marine-adjacent applications. Please note that while the hexagon head design facilitates easy installation, users must ensure proper thread engagement and torque application to prevent stripping, as stainless steel can be prone to galling if over-tightened.
| Colour | Silver |
|---|---|
| Model Part Number | 5014196330938 |
| Brand | Unifix |
A4-316 is a marine-grade stainless steel containing molybdenum, which significantly enhances its resistance to corrosion, particularly in chloride or salt-rich environments.
Yes, but ensure the length is sufficient to provide adequate bite and consider using washers to prevent the head from sinking into the wood.
Yes, as a setscrew conforming to DIN 933, the threading runs the entire length of the shank.
For critical structural applications, a torque wrench is recommended to ensure you do not exceed the mechanical limits of the steel, though for general DIY tasks, hand-tightening until snug is usually sufficient.
A4-316 is highly resistant to rust, but it is not entirely 'stain-proof' in extreme conditions; keeping the surface clean and free of abrasive contaminants helps maintain its appearance.
Verify that the threads are clean of debris and confirm that both the screw and nut are M10 gauge.
Apply a stainless steel-compatible anti-seize lubricant to the threads before tightening.
To ensure the longevity of your Unifix setscrews, avoid using carbon steel tools to tighten them, as particles can transfer and cause surface rust. Use stainless steel compatible tools where possible. Always ensure that the mating nut or thread is also M10 to prevent cross-threading. If you find the screws are difficult to turn, apply a small amount of anti-seize paste to the threads to prevent galling, a common occurrence with stainless steel fasteners. Store the screws in a dry area to maintain their finish until they are ready for use.
