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The Range£13.37Visit shop Unifix Grade 10.9 Ht Hexagon Bolts Din 931 S/Col - M14 X 45 - Box Of 50 - Grey
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The Unifix Grade 10.9 HT Hexagon Bolts are high-strength industrial fasteners designed for professional engineers, construction contractors, and heavy-duty fabricators who require reliable structural integrity. These bolts provide superior load-bearing capacity and resilience in demanding environments; however, they require precise selection of size and torque specifications to ensure optimal safety and performance in specific assembly applications.
| Colour | Black |
|---|---|
| Model Part Number | 5014196373973 |
| Brand | Unifix |
Grade 10.9 refers to the strength of the bolt, where the first number (10) represents the tensile strength and the second number (.9) indicates the ratio of yield to tensile strength, common in high-tensile fasteners.
While durable, these bolts are not inherently stainless steel. If used outdoors, they should be treated or checked regularly for signs of oxidation.
DIN 931 bolts are partially threaded, meaning they have a smooth shank section, whereas DIN 933 bolts are fully threaded.
Yes, using a hardened steel washer is recommended to distribute clamping force evenly and prevent damage to the surface of the component being fastened.
It is generally advised to replace high-tensile structural bolts if they have been torqued to their yield point, as they may have undergone permanent plastic deformation.
You will need a high-quality spanner, socket set, or torque wrench corresponding to the hexagon head size of the bolt.
Verify that the hole diameter and pitch match the DIN 931 specifications; check for debris or paint inside the threaded hole.
Ensure the socket or wrench is the correct size and fully seated; check that the tool is not worn down.
Confirm the load requirements do not exceed the Grade 10.9 limits; verify the joint design properly utilizes the smooth shank rather than the threaded section.
For proper installation, always use a calibrated torque wrench to apply the manufacturer-specified tension for a Grade 10.9 bolt of your specific diameter. Do not exceed the yield strength of the material. Before installation, clean the threads to ensure no debris compromises the fit. Because these bolts are manufactured for strength, they may be prone to surface oxidation if used in outdoor or moist conditions; consider applying a suitable anti-seize lubricant or corrosion-resistant coating if your application demands longevity in exposed environments. Ensure that the washers and nuts used are rated at a matching or superior strength grade to maintain the integrity of the bolted joint.
