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The Range£11.72Visit shop Unifix Grade 8.8 Ht Hexagon Bolts Din 931 Bzp - M12 X 60 - &Mhb12 060 081 - Box Of 50 - Grey
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This guide is for builders, mechanics, and engineers seeking robust fastening solutions. The Unifix Grade 8.8 HT Hexagon Bolts offer high tensile strength and excellent corrosion resistance for demanding applications. A key caveat is their specific M12 x 60 sizing, requiring compatibility with corresponding nuts and tools. These bolts feature a standard DIN 931 design with a durable BZP coating, ideal for construction, automotive, and engineering projects where reliability is paramount.
| Colour | Silver |
|---|---|
| Model Part Number | M12 X 60 |
| Brand | Generic Fasteners |
'Grade 8.8' refers to the material strength, indicating a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa. 'HT' stands for High Tensile, confirming its suitability for high-stress applications.
DIN 931 is a German Institute for Standardization (Deutsches Institut für Normung) standard that specifies the dimensions and properties for partially threaded hexagon head bolts. It ensures consistent sizing and performance characteristics.
BZP stands for Bright Zinc Plating. It's a common surface treatment that provides a shiny appearance and offers good protection against corrosion for steel fasteners in typical environments. The CR3+ standard indicates a more environmentally friendly passivation layer over the zinc.
Yes, the BZP coating provides good corrosion resistance, making them suitable for many outdoor applications. However, for extremely corrosive environments (e.g., coastal or industrial areas), stainless steel or specialized coatings may offer longer-term protection.
For an M12 bolt, you should use an M12 nut and an M12 washer. Ensure the washer is also compatible with M12 bolts.
Use a damp cloth to wipe away dust and light dirt. For tougher grime, a mild soap and water solution can be used, followed by thorough drying. Avoid abrasive cleaners or solvents that could damage the BZP coating.
Check that the bolt is M12 and the mating thread or nut is also M12. Ensure both threads are clean and free from damage or debris. Verify you are using the correct orientation if the bolt has a specific lead thread.
Ensure you are using the correct size socket or spanner (typically 19mm for M12 hex head). Check for obstructions around the bolt head preventing full engagement of the tool. Do not force the tool if it feels like it might strip the head.
While BZP coated, prolonged exposure to extreme conditions can cause minor surface rust. Clean gently with a wire brush and consider applying a protective coating if the environment is particularly harsh.
Setup: These M12 x 60 hexagon bolts are designed for straightforward installation. Ensure the threaded holes or mating components are clean and free of debris. Use a compatible M12 nut and washer, or thread directly into a pre-tapped hole. Tighten using a metric socket wrench or spanner of the appropriate size (typically 19mm for M12 hex heads). Do not overtighten, as this can damage the threads or the bolt itself.
Compatibility: These bolts adhere to the DIN 931 standard, ensuring compatibility with most standard M12 nuts, washers, and tools. They are designed for use with materials that can withstand the high tensile strength of Grade 8.8.
Care: To maintain the corrosion resistance of the BZP coating, avoid exposing the bolts to harsh chemicals or abrasive cleaning agents. If used in corrosive environments, regular inspection for signs of wear or damage is recommended. Store in a dry place to prevent premature oxidation.
