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The Unifix A2-70 Socket Head Cap Screws (M12 x 30) are professional-grade fasteners designed for high-strength industrial and mechanical assemblies where corrosion resistance is essential. These screws are ideal for engineers and technicians requiring reliable, secure connections in demanding environments, though they require specific hex key tools for installation and may not be suitable for applications requiring non-magnetic or specialized alloy steel properties.
| Colour | Silver |
|---|---|
| Model Part Number | 5014196344386 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (304), and 70 indicates the tensile strength of the material.
While A2 stainless steel has good corrosion resistance, for continuous exposure to saltwater, A4 grade (316) is typically recommended.
You will need a standard metric hex key that matches the socket size of an M12 bolt.
A2-70 stainless steel may exhibit slight magnetic properties, especially after the cold-working process of manufacturing, but they are generally considered non-magnetic.
DIN 912 is the German standard for hexagon socket head cap screws, ensuring consistency in head diameter, thread pitch, and overall dimensions.
Ensure you are using the correct metric size hex key and that it is not worn or rounded.
Check for cross-threading or debris in the hole; back out the screw and clear the threads before attempting to re-insert.
Clean the surface with a stainless-steel compatible cleaner and ensure the fastener is not exposed to harsh chemicals that degrade A2 stainless alloys.
To install these screws, ensure you use a correctly sized metric hex key to avoid stripping the internal socket. For optimal longevity, keep the threads clean of debris before installation. While A2-70 steel is corrosion-resistant, avoid using these screws in highly acidic or marine environments without proper protective coating or additional sealants if necessary. Always verify the depth of your bore hole to ensure the 30mm length provides sufficient thread engagement without bottoming out.
