Unifix A2-304 Hexagon Setscrews M10 x 70 - Grey

The Unifix A2-304 Stainless Steel Hexagon Setscrews DIN 933 are designed for robust fastening in v...

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The RangeUnifix A2-304 St/St Hexagon Setscrews M8 X 30 - Q209330000800030000 - Grey
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Product Information

Full details

The Unifix A2-304 Stainless Steel Hexagon Setscrews are engineered for professionals and DIY enthusiasts requiring high-strength, corrosion-resistant fastening in structural and mechanical projects. These M10 x 70 fasteners offer exceptional durability and reliable holding power in demanding environments, though they require specific tooling, such as a matching hex wrench or socket, for proper installation.

All features

ColourGrey
Model Part Number5014196324364
BrandUnifix

Extended Product Information

FAQs

What does A2-304 mean?

A2-304 is a standard grade of austenitic stainless steel that offers excellent corrosion resistance and strength for general atmospheric environments.

Does this screw come with a nut?

No, these are individual setscrews. Nuts and washers should be purchased separately based on your project requirements.

Can I use these for marine applications?

While A2 stainless is corrosion-resistant, A4 grade is generally recommended for high-salinity or direct saltwater immersion.

What is the DIN 933 standard?

DIN 933 is a German industrial standard defining the specifications for hexagon head bolts that are fully threaded.

Can these be used with wooden materials?

While they are intended for mechanical/metal use, they can be used with wood if a matching threaded insert or nut/washer combination is used to prevent damage to the timber.

Troubleshooting

Bolt feels stiff while threading

Clean the threads of both the screw and the hole to remove metal shavings or debris. Use a lubricant if necessary.

Stripped or damaged bolt head

Ensure you are using the correct size wrench/socket to avoid slippage. If damaged, replace the screw immediately to maintain joint safety.

Signs of rust on the bolt head

Check for galvanic corrosion if the bolt is in contact with a different metal. Clean the surface or replace if structural integrity is compromised.

Pros and Cons

Pros

  • Excellent resistance to oxidation and rust in harsh conditions
  • Easy to install and tighten using standard hex-drive tools
  • High structural integrity for load-bearing mechanical applications
  • Reliable manufacturing consistency adhering to DIN 933

Cons

  • Stainless steel may be prone to galling if tightened too quickly
  • Not intended for high-heat or extreme chemical environments where A4 grade might be required
  • Limited to specific M10 metric threading

Setup, Compatibility & Care

For installation, use a compatible metric socket or combination spanner that fits the M10 head size. When pairing these with nuts or washers, always ensure the mating hardware is also made of A2-304 stainless steel to prevent galvanic corrosion, which occurs when two different metals react. While these screws are corrosion-resistant, it is recommended to periodically inspect them for debris or salt buildup if installed in coastal or industrial areas. If necessary, clean with a soft cloth and a non-abrasive cleaner to maintain the integrity of the stainless steel surface.

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