Unifix Grade 12.9 HT Hexagon Bolts - Black - M12 X 100

The Unifix Grade 12.9 HT Hexagon Bolts DIN 931 S/Col - M12 X 100 are designed for high-strength ap...

Best current price£19.70from The Range

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The RangeUnifix Grade 12.9 Ht Hexagon Bolts Din 931 S/Col - M10 X 40 - Box Of 100 - Grey
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eBayUnifix Grade 12.9 HT Hexagon Bolts M10 X 40 - Box of 100
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OnBuy.comUnifix Grade 12.9 Ht Hexagon Bolts M10 X 40 - Box Of 100 5014196376202
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DebenhamsUnifix Unisex Black Grade 12.9 Ht Hexagon Bolts - Box Of 100 In
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B&QB&Q - Grade 12.9 Ht Hexagon Bolts Din 931 S/colM10 X 40Box Of 100
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Product Information

Full details

These Unifix Grade 12.9 HT Hexagon Bolts (M12 X 100) are designed for professionals and DIY enthusiasts needing robust fastening solutions for demanding projects. Their key benefit is superior strength and durability, ensuring reliable connections in construction, automotive, and machinery applications. A potential caveat is their specific size (M12 x 100), which may not fit all applications. This product offers high tensile strength, durable construction, versatility, and ease of installation, all in a sleek black finish.

All features

ColourBlack
Model Part NumberM12 X 100
BrandUnifix

Extended Product Information

FAQs

What does 'Grade 12.9' mean for these bolts?

Grade 12.9 signifies a high tensile strength classification for bolts, indicating a minimum tensile strength of 1200 MPa and a minimum yield strength of 900 MPa. This makes them suitable for very demanding applications.

What is the length of these bolts?

The length of these bolts is 100 millimeters (mm).

What type of head do these bolts have?

These bolts feature a standard hexagon head, which is designed for tightening with common tools like wrenches and sockets.

How many bolts are included in a box?

Each box contains 50 Unifix Grade 12.9 HT Hexagon Bolts.

Are these bolts suitable for outdoor use?

These bolts offer corrosion resistance, making them suitable for many outdoor applications. However, for extremely harsh or continuous exposure to elements, additional protective measures might be recommended.

Can I use these bolts with any M12 nut?

Yes, these M12 bolts are designed to be used with standard M12 nuts. It's recommended to use nuts of a compatible grade for safety-critical applications.

What is the primary advantage of using Grade 12.9 bolts over lower grades?

The primary advantage is their significantly higher tensile and yield strength, allowing them to withstand much greater loads and stresses, thus providing a more secure and reliable fastening in critical applications.

Troubleshooting

Bolt head strips during tightening

Ensure you are using the correct size and type of wrench or socket. Do not overtighten. If the head is already damaged, the bolt may need to be removed using specialized tools or drilling.

Bolt does not thread smoothly

Check that you are using the correct M12 nut or tapped hole. Ensure the threads on both the bolt and the nut/hole are clean and free from dirt, paint, or damage. Start threading by hand to prevent cross-threading.

Bolt appears to be rusting

While these bolts have corrosion resistance, prolonged exposure to harsh conditions can still cause surface rust. Clean the affected area with a mild abrasive and consider applying a protective coating if the environment is particularly aggressive.

Bolt doesn't provide enough clamping force

Verify that the correct torque setting for Grade 12.9 bolts has been applied using a calibrated torque wrench. Ensure you are using appropriate washers and that the mating surfaces are clean and flat.

Pros and Cons

Pros

  • Exceptional tensile strength for heavy-duty applications.
  • Robust construction ensures longevity and reliability.
  • Versatile use across construction, automotive, and machinery sectors.
  • Easy installation with standard tools.
  • Good corrosion resistance for varied environments.

Cons

  • Specific size (M12 x 100) may limit universal application.
  • Requires appropriate torque settings to achieve full strength potential.
  • Black finish may scratch or wear over time in abrasive conditions.

Setup, Compatibility & Care

Setup:

These bolts require a corresponding nut and washer of the same size (M12) and thread pitch for proper installation. Ensure the threaded holes or nuts are clean and free from debris. Use a torque wrench set to the manufacturer's recommended torque specifications for Grade 12.9 bolts to achieve optimal clamping force without damaging the bolt or the material being joined. Ensure the appropriate tool (e.g., socket wrench, spanner) fits the M12 hexagon head securely.

Compatibility:

These M12 x 100 bolts are compatible with M12 nuts and M12 tapped holes. The length of 100mm (approximately 4 inches) is suitable for applications requiring a medium to long-reaching fastener. Always ensure the material being fastened can accommodate a bolt of this diameter and tensile strength.

Care:

Store bolts in a dry environment to prevent premature corrosion, even with their resistance properties. If used in highly corrosive environments, consider applying an anti-seize compound or further protective coating. Periodically inspect fastened joints for any signs of wear or loosening, especially in applications subject to vibration.

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