Unifix Grade 10.9 Socket Csk Head Screws - Silver
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Product Information
Full details
Unifix Grade 10.9 Socket Csk Head Screws are high-strength industrial fasteners designed for professionals and DIYers requiring reliable, heavy-duty connections in mechanical and structural projects. Featuring a robust Grade 10.9 steel construction and a corrosion-resistant galvanized finish, these screws provide exceptional tensile strength for demanding environments. Please note that the countersunk head design requires precise surface preparation to ensure a perfectly flush fit.
All features
| Colour | Silver |
|---|---|
| Model Part Number | 1260944 |
| Brand | Unifix |
Extended Product Information
FAQs
What does Grade 10.9 mean?
Grade 10.9 refers to the mechanical property of the steel, indicating a high tensile strength suitable for structural and heavy-duty mechanical use.
Can these be used outdoors?
Yes, the galvanized finish provides good corrosion resistance, but they are not recommended for extremely harsh or marine environments.
What tool do I need to install these?
You need a standard metric hex key (Allen key) that matches the size of the socket head.
Do I need to pre-drill holes?
Yes, these are machine screws and require a pre-drilled, tapped hole and a countersunk pilot to sit flush.
Are these screws magnetic?
Yes, because they are made from high-strength carbon steel, they are magnetic.
Troubleshooting
Hex key slips inside the socket head
Verify you are using the correct metric size hex key; if the socket is already damaged, use a screw extractor to remove the fastener.
Screw head sits above the surface
Check that the countersunk hole is deep enough and at the correct 90-degree angle to accommodate the screw head taper.
Pros and Cons
Pros
- Superior tensile strength compared to standard mild steel fasteners
- Flush finish improves safety and aesthetic appeal
- Galvanized finish increases longevity in humid or exposed conditions
- Easy to tighten using standard hex keys or Allen wrenches
Cons
- Requires countersunk hole preparation
- Socket drive can be prone to stripping if incorrect size tools are used
- Not suitable for applications requiring extreme chemical resistance (consider stainless steel instead)
Setup, Compatibility & Care
To achieve optimal results, always drill and countersink your material to the exact angle specified by DIN 7991 standards. Ensure you are using the correct metric hex key size to avoid rounding the internal socket. For long-term performance, periodically check the torque on load-bearing assemblies, as vibration may loosen connections over time. Store the screws in a dry, cool place to maintain the integrity of the galvanized finish before use.