Unifix Hexagon Setscrews - M10 x 100 - Silver

The Unifix A4-316 Stainless Steel Hexagon Setscrews are designed for reliable fastening in various...

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eBayUnifix A4-316 Hexagon Setscrews M12 x 25 - Box of 50
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DebenhamsUnifix Unisex Silver A4-316 Hexagon Setscrews M12 X 25 - Box Of 50 In
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OnBuy.comUnifix A4-316 Hexagon Setscrews M12 X 25 - Box Of 50 5014196330952
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B&QB&Q - A4-316 St/st Hexagon Setscrews M12 X 25Box Of 50
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Product Information

Full details

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.

All features

ColourSilver
Model Part Number5014196330938
BrandUnifix

Extended Product Information

FAQs

What does A4-316 stainless steel mean?

A4-316 is a marine-grade stainless steel containing molybdenum, which significantly enhances its resistance to corrosion, particularly in chloride or salt-rich environments.

Can these be used for structural wood projects?

Yes, but ensure the length is sufficient to provide adequate bite and consider using washers to prevent the head from sinking into the wood.

Are these screws fully threaded?

Yes, as a setscrew conforming to DIN 933, the threading runs the entire length of the shank.

Should I use a torque wrench?

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.

Will these rust over time?

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.

Troubleshooting

Screw is difficult to thread into a nut

Verify that the threads are clean of debris and confirm that both the screw and nut are M10 gauge.

Thread seizing or galling

Apply a stainless steel-compatible anti-seize lubricant to the threads before tightening.

Pros and Cons

Pros

  • Superior corrosion resistance compared to standard zinc-plated screws
  • Easy to install using common hand tools
  • Meets rigorous DIN 933 industry standards
  • High-quality A4-316 stainless steel construction
  • Versatile length ideal for structural and heavy-duty assembly

Cons

  • Higher material cost compared to basic carbon steel fasteners
  • Requires proper lubrication to avoid thread galling
  • Limited availability for specific non-standard head shapes

Setup, Compatibility & Care

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.

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