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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 High Tensile Hexagon Setscrews are professional-grade fasteners designed for heavy-duty applications in construction, machinery, and automotive repair. These setscrews provide exceptional durability and structural integrity due to their Grade 8.8 rating, making them ideal for high-stress connections. While they offer superior strength and corrosion resistance thanks to the bright zinc plating, users must ensure they select the exact thread pitch and diameter required for their specific assembly to avoid stripping or fitment issues.
| Colour | Grey |
|---|---|
| Model Part Number | 1261971 |
| Brand | Unifix |
Grade 8.8 is a mechanical property class indicating the bolt's tensile strength. The '8' represents 800 MPa nominal tensile strength, and the '.8' indicates the yield point is 80% of the tensile strength.
Yes, DIN 933 refers to hexagon head setscrews which are threaded along their entire length from the head to the tip.
Yes, the bright zinc plated finish provides good corrosion resistance for general outdoor use, though they are not intended for harsh marine or chemically corrosive environments.
You will need a standard metric wrench or socket set corresponding to the head size of your M16 bolt.
While they can physically thread together, it is generally recommended to use zinc-plated nuts to prevent galvanic corrosion.
Ensure the socket or wrench is the correct metric size and sits fully flush on the head before applying force.
Check the hole for burrs or debris, and verify that the thread pitch matches the screw; do not force if resistance is encountered.
To install, use a properly sized metric spanner or socket to avoid rounding the hexagonal head. Ensure the receiving hole is correctly tapped for the M16 thread and that the surface is clean of debris. Do not over-torque, as exceeding the recommended load for Grade 8.8 steel can lead to material failure. To maintain the life of the fasteners, avoid using them in acidic or high-moisture conditions without additional protective coatings. If stored long-term, keep them in a dry, low-humidity environment to preserve the zinc finish.
