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The Unifix Socket Head Cap Screws are ideal for professional engineers, machinists, and DIY enthusiasts who require high-strength, reliable fastening for mechanical and structural assemblies. These A2-70 grade stainless steel screws offer excellent corrosion resistance and precision fit, though users should ensure they select the correct thread pitch and length for their specific application to prevent stripping or mechanical failure.
| Colour | Silver |
|---|---|
| Model Part Number | A2-70 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (similar to 304), and 70 indicates the tensile strength of the fastener.
While A2 stainless steel provides good corrosion resistance, it is generally recommended to use A4 (316) grade stainless steel for direct exposure to marine or saltwater environments.
Yes, provided the thread size and grade meet the specific mechanical requirements of the automotive application as defined by the manufacturer.
You will need a standard hex key or Allen wrench that matches the diameter of the internal socket head.
If they have not been over-torqued, stretched, or suffered thread damage, they can generally be reused.
The screw head socket is likely stripped; use a bolt extractor or try a slightly larger spline tool to gain purchase.
Ensure the threads are clean and free of debris. Back the screw out, check the tap hole for thread damage, and re-insert carefully to avoid cross-threading.
To install, ensure your pilot holes are properly tapped to the matching thread size. Use a high-quality hex key of the appropriate size to avoid 'rounding out' the inner socket of the screw head. Do not over-tighten, as stainless steel can be prone to seizing under extreme pressure; applying a small amount of anti-seize lubricant to the threads is recommended for applications involving frequent disassembly. When cleaning, use mild detergents and avoid harsh acidic chemicals that could compromise the passive oxide layer of the stainless steel.
