Best current price£9.64from The Range
Shopping.co.uk recommended and popular offers
The Range£9.64Visit shop Unifix A2-70 St/St Socket Button Head Screws M6 X 16 - Box Of 200 - Grey
Visit shop50 offers from £9.64 - £18.45
View price history by clicking the chart icon.
The Unifix A2-70 Socket Button Head Screws (M5 x 25) are designed for professionals and hobbyists looking for a reliable, corrosion-resistant fastening solution for assembly and repair projects. These screws offer high-quality performance and a low-profile aesthetic that sits flush against surfaces, though users should ensure they have the correct size hex key for installation to avoid stripping the drive.
| Colour | Grey |
|---|---|
| Model Part Number | A2-70 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (typically 304) which provides good corrosion resistance, while 70 denotes a tensile strength class of 700 N/mm2.
While A2-70 offers good corrosion resistance, it is generally recommended for non-marine, standard outdoor environments. Avoid using in high-salinity or heavy chemical exposure areas.
The head diameter adheres to the ISO 7380-1 standard for an M5 screw, typically measuring approximately 9.5mm.
A2-70 stainless steel may exhibit very slight magnetic properties due to the cold-working process, but they are generally considered non-magnetic for most practical applications.
You can use a power drill, but it is highly recommended to set it to a low torque setting to avoid stripping the socket or over-tightening the screw.
Verify that the hole is clear of debris and that the thread pitch matches the intended application.
Ensure you are using the correct size hex key and that it is fully seated to the bottom of the screw head.
Stop immediately; use a bolt extractor or pliers to remove the damaged screw and replace it with a fresh one.
Installation requires a standard hex key (Allen wrench) sized for M5 socket heads. When installing, ensure the screw is threaded straight into the mating hole to prevent cross-threading, which can damage the component and the fastener. Because these are stainless steel, avoid using impact drivers at high speeds, which can cause heat buildup and galling of the threads. For long-term maintenance, keep the screws stored in a dry, cool environment to maintain the finish and prevent surface contamination.
