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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 A4-316 M10 x 25 Hexagon Setscrews are professional-grade fasteners designed for contractors and DIY enthusiasts who require superior corrosion resistance and a secure, lasting hold. Crafted from high-quality A4-316 grade stainless steel, these bolts offer excellent durability in demanding environments, though they may be overkill for simple indoor projects where standard zinc-plated hardware would suffice.
| Colour | Silver |
|---|---|
| Model Part Number | Q409330001000025000 |
| Brand | Unifix |
Yes, the A4-316 stainless steel grade is specifically chosen for its high resistance to chlorides and salt spray.
You will need a standard M10 compatible wrench or a socket set.
DIN 933 signifies that the setscrew is fully threaded and meets specific metric dimensional standards.
Yes, but be aware that using stainless steel in contact with mild steel in outdoor environments can cause galvanic corrosion.
No, the 25mm measurement for a setscrew typically refers to the length of the threaded shank under the head.
Check for debris in the threads or damage to the hole. Apply a light coat of anti-seize or thread lubricant to the bolt.
Ensure your socket or wrench size exactly matches the M10 head specification and is fully seated before applying torque.
To install these M10 setscrews, ensure that your mating component is pre-drilled to at least 10.5mm for clearance applications. Always use a compatible M10 nut or a properly tapped hole to prevent cross-threading. Because stainless steel is prone to galling under heat and friction, it is highly recommended to apply a small amount of anti-seize lubricant to the threads before tightening, especially when using impact drivers. After installation, periodically inspect the bolt heads for any signs of surface contaminants, though the A4-316 material itself is naturally rust-resistant. Avoid over-torquing, as stainless steel can stretch more easily than hardened carbon steel fasteners.
