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OnBuy.com£7.48Visit shop Black Countersunk Hex Socket Bolts Din 7991 Iso 10642 Grade 10.9 Allen Key Flat Head Screws M4 To M8 5056826614315
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B&Q£9.78Visit shop B&Q - M4 X 12mm Black Hex Socket Countersunk Bolts (Pack Of: 10) Din 7991 Flat Head Allen Screws
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This guide is for professionals, makers, and DIY enthusiasts seeking durable, low-profile fasteners. The key benefit is a secure, flush finish ideal for visible applications. A potential caveat is the specific measurement convention for countersunk bolts. These M5 x 10mm black oxide bolts, made from high-tensile carbon steel (Grade 10.9), offer corrosion resistance and a stealthy aesthetic, perfect for projects ranging from electronics repair to furniture assembly.
| Colour | Black |
|---|---|
| Model Part Number | M5 x 10mm |
| Brand | DIYUK |
Countersunk bolts, including these M5 x 10mm variants, are measured by their total length, from the very top of the flat head down to the tip of the screw. This is different from cap head screws.
They are made from high-tensile carbon steel, specifically Grade 10.9, which provides excellent strength and durability.
The black oxide finish provides a layer of corrosion resistance and gives the bolt a matte, stealthy appearance, making it suitable for aesthetic applications.
Typically, M5 hex socket (Allen) screws require a 3mm hex key, but it's always best to confirm with your specific tool set.
The black oxide finish offers moderate corrosion resistance, but for prolonged outdoor use or in highly corrosive environments, stainless steel or other specially treated fasteners may be more suitable.
These are international standards that specify the dimensions, tolerances, and performance requirements for countersunk head cap screws, ensuring compatibility and quality.
Yes, carbon steel bolts are typically magnetic.
Ensure the mating hole is properly countersunk to the correct 90-degree angle for the bolt head. Verify the hole depth is sufficient.
Use the correct size hex key and ensure it is fully seated in the socket before applying torque. Avoid excessive force.
Check that you are using an M5 bolt with an M5 threaded hole or nut. Ensure the threads are clean and free from debris. Verify the correct thread pitch if applicable.
Wipe the bolt with a lightly oiled cloth. For long-term protection, consider applying a suitable metal protectant or wax, especially if used in damp environments.
Setup: To install, ensure you have the correct size hex (Allen) key. Choose a pre-tapped hole or use with a compatible nut. Insert the bolt and tighten until snug, ensuring the head sits flush with the surface. Remember that the M5 x 10mm measurement refers to the total length from the top of the head to the tip.
Compatibility: These bolts are compatible with M5 nuts and threaded holes conforming to DIN 7991 / ISO 10642 standards. They are suitable for use in wood, plastic, and metal when appropriate pre-drilled holes or inserts are used.
Care: To maintain the black oxide finish and prevent rust, avoid prolonged exposure to moisture or corrosive environments. If cleaning is needed, use a dry or slightly damp cloth. Avoid abrasive cleaners that could damage the finish.
