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The Unifix A2-70 Socket Head Cap Screws (M12 x 25) are high-strength fastening solutions designed for professionals and DIY enthusiasts requiring reliable, corrosion-resistant hardware. Engineered to meet the rigorous DIN 912 industrial standard, these screws feature a robust socket head design that facilitates secure installation in tight spaces. While they offer exceptional durability and longevity, users should ensure they are using the correct hex key size to prevent stripping the socket head during high-torque applications.
| Colour | Grey |
|---|---|
| Model Part Number | 5014196344379 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (304), which is corrosion-resistant. The 70 indicates a minimum tensile strength of 700 N/mm².
While A2-70 has good corrosion resistance, for continuous saltwater immersion, an A4 (316 grade) stainless steel is generally recommended.
DIN 912 is a German industrial standard defining the dimensions and specifications for socket head cap screws.
Yes, provided the threads and the internal hex socket have not been damaged or deformed during previous installation.
Using a torque wrench is highly recommended for critical structural assemblies to ensure the fastener meets the intended tension without over-tightening.
Verify that you are using the correct metric hex key size and ensure the tool is not worn out. If the socket is already stripped, use a screw extractor.
Check the thread pitch and diameter match. Ensure the hole is clear of rust, paint, or debris that might cause cross-threading.
To ensure the longevity of your fastening application, start by confirming that the mounting surface and thread pitch match the M12 specification. Use a high-quality, hardened steel hex key to tighten the screw; ensure the key is fully seated in the socket before applying torque. While these screws are corrosion-resistant, avoid using them in contact with dissimilar metals that may induce galvanic corrosion. Periodically inspect the fastener for signs of looseness or environmental degradation in high-vibration applications. When replacing older hardware, clean the threaded hole to remove debris, which can otherwise impede proper torque application and lead to false-positive tension readings.
