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The Range£8.91Visit shop Unifix Grade 8.8 Ht Hexagon Setscrews Din 933 Bzp - M4 X 16 - Grey
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The Unifix Grade 8.8 HT Hexagon Setscrews are engineered for construction professionals, automotive mechanics, and engineers who require high-tensile fastening solutions for demanding structural applications. These setscrews provide exceptional durability and reliable load-bearing capabilities through their standardized DIN 933 construction; however, users should note that the grey finish is primarily designed for industrial utility rather than decorative exterior finishes.
| Colour | Grey |
|---|---|
| Model Part Number | 1261916 |
| Brand | Unifix |
The 8.8 rating indicates the mechanical properties of the steel, specifically that the fastener has a minimum tensile strength of 800 MPa and a yield strength of 640 MPa.
Yes, DIN 933 specifies that the bolt is threaded from the underside of the head to the tip, making it a full-thread setscrew.
While they are durable, the standard grey finish is not specifically rated for long-term exposure to salt air or constant moisture; consider a secondary coating or lubricant if used outdoors.
A standard metric wrench or a socket set corresponding to the head size of the bolt is required.
Yes, their high-tensile nature makes them suitable for machinery, though the use of locking washers or thread-locking fluid is recommended in high-vibration environments.
Verify that the hole is free of debris and that the thread pitch matches the DIN 933 specifications.
Ensure you are using the correct metric socket size and that the tool is fully seated on the head.
Ensure the thread pitch of the component you are fastening matches the DIN 933 specifications to prevent stripping. When installing, use a matching hexagon socket or spanner that fits the head profile tightly to prevent rounding. For care, while the grey finish provides baseline protection, store fasteners in a dry, low-humidity environment to prevent surface oxidation. If using these in high-vibration areas, consider applying a thread-locking compound to prevent the setscrew from loosening over time.
