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The Range£10.06Visit shop Unifix Grade 8.8 Ht Hexagon Setscrews Din 933 S/Col M18 X 50 - Grey
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The Unifix Grade 8.8 HT Hexagon Setscrews are engineered for professionals and DIY enthusiasts requiring reliable, high-strength fastening for construction and engineering projects. These M6 x 60 screws deliver superior tensile performance thanks to their Grade 8.8 steel construction, though users should note that the black finish is prone to surface oxidation if not properly treated in humid or exposed outdoor environments.
| Colour | Black |
|---|---|
| Model Part Number | DIN 933 M6 X 60 |
| Brand | Unifix |
Grade 8.8 indicates the mechanical properties of the steel, specifically a tensile strength of 800 MPa and a yield strength of 640 MPa.
Yes, as they conform to the DIN 933 standard, they are fully threaded from the head to the tip.
They can be used outdoors if kept dry or treated with a protective oil, but they are not rust-proof and are best suited for indoor or sheltered environments.
M6 bolts typically require a 10mm wrench or socket for the hexagon head.
No, the screws are supplied as the fasteners only; washers should be purchased separately based on the specific assembly requirements.
Check the tapped hole for debris or cross-threading; re-tap if necessary and ensure the screw is properly aligned.
Clean the area with a wire brush and apply a protective rust-inhibiting coating or light machine oil.
To ensure optimal performance, use a correctly calibrated torque wrench to avoid over-tightening. These screws are compatible with standard M6 nuts and washers. Because the black oxide finish lacks the corrosion resistance of zinc or stainless steel, it is recommended to apply a thin coat of machine oil or a corrosion inhibitor if the screws are to be used in unheated garages or semi-exposed locations. For critical structural joints, always consult engineering specifications to ensure Grade 8.8 is sufficient for the load requirements.
