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Grade 12.9 Socket Head Cap Screws DIN 912 - M6 x 25 - Box of 200 - Black

Grade 12.9 Socket Head Cap Screws DIN 912 - M6 x 25 - Box of 200 - Black

The Unifix Grade 12.9 Socket Head Cap Screws DIN 912 are designed for high-strength applications, ...

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Unifix Grade 12.9 Socket Head Cap Screws M3 X 8 - Box Of 200 5014196340548

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Unifix Grade 12.9 Socket Head Cap Screws Din 912 Plain - M6 X 25 (Box Of 200) - Grey

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OnBuy.comUnifix Grade 12.9 Socket Head Cap Screws M3 X 8 - Box Of 200 5014196340548
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The RangeUnifix Grade 12.9 Socket Head Cap Screws M3 X 8 - Box Of 200 - Grey
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DebenhamsUnifix Unisex Black Grade 12.9 Socket Head Cap Screws - Box Of 200 In
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eBayUnifix Grade 12.9 Socket Head Cap Screws M3 x 8 - Box of 200
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B&QB&Q - Grade 12.9 Socket Head Cap Screws Din 912 S/colM3 X 8Box Of 200
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Product Information

Full details

The Unifix Grade 12.9 Socket Head Cap Screws are engineered for engineers, mechanics, and DIY enthusiasts who require high-tensile strength for demanding structural and mechanical assembly projects. These fasteners offer superior load-bearing capacity and a reliable socket-head drive system, though they are specifically intended for high-stress applications where standard grade fasteners might fail.

All features

ColourBlack
Model Part Number5014196341118
BrandUnifix

Extended Product Information

FAQs

What does 'Grade 12.9' mean?

Grade 12.9 refers to the strength of the steel. It indicates the material's minimum tensile strength of 1200 MPa and yield strength of 1080 MPa.

Are these screws suitable for outdoor use?

These screws are intended primarily for indoor or climate-controlled environments due to their black oxide finish, which provides minimal rust protection.

Can I use these for structural automotive parts?

Yes, Grade 12.9 fasteners are commonly used in automotive applications, provided they meet the specific tension and diameter requirements for the task.

Is the Allen key included in the box?

No, the box contains 200 pieces of screws, but an Allen key is not included.

What is the benefit of the socket head design?

The socket head allows for higher torque application compared to slotted or Phillips heads and works well in confined spaces.

Troubleshooting

Hex key does not fit properly

Verify you are using the correct metric Allen key size corresponding to the specific screw diameter.

Screw binds or feels tight during installation

Check the thread pitch of the mating hole and ensure it is free of rust, paint, or cross-threading damage.

Surface rust appears on the screw head

The black oxide finish is not corrosion-proof. Clean the surface with an abrasive pad and apply a protective oil or wax coating.

Pros and Cons

Pros

  • High-tensile Grade 12.9 steel provides superior load capacity.
  • Socket head design prevents cam-out during tightening.
  • Consistent manufacturing quality according to DIN 912 specs.
  • Pack size of 200 is cost-effective for frequent users.

Cons

  • Black finish offers limited corrosion resistance compared to stainless steel.
  • Requires specific hex key sizes for proper installation.
  • Over-tightening can lead to fastener fatigue in certain materials.

Setup, Compatibility & Care

To ensure the longevity of your Grade 12.9 screws, always use a high-quality, hardened steel hex key that fits the socket perfectly to avoid rounding the internal drive. Before installation, ensure that the threaded holes are clean and free of debris.

  • Compatibility: These screws conform to DIN 912 standards and are compatible with all metric components sharing the same pitch and thread specification.
  • Care: While the black oxide finish is durable, it is susceptible to rust if exposed to extreme moisture. For outdoor or high-moisture environments, consider applying a light coat of anti-seize or machine oil to the threads to prevent oxidation and ensure easy removal in the future.

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