Best current price£4.35from OnBuy.com
Shopping.co.uk recommended and popular offers
OnBuy.com£4.35Visit shop Unifix Grade 12.9 Socket Head Cap Screws M3 X 8 - Box Of 200 5014196340548
Visit shop
The Range£4.45Visit shop Unifix Grade 12.9 Socket Head Cap Screws M3 X 8 - Box Of 200 - Grey
Visit shop50 offers from £4.35 - £25.33
View price history by clicking the chart icon.
The Unifix Grade 12.9 Socket Head Cap Screws are high-strength industrial fasteners ideal for professional engineers, machinists, and builders who require maximum load-bearing capability and reliability in heavy-duty applications. These screws offer exceptional tensile strength and a secure, precise fit via a standard hex drive, though users should be aware that their high-carbon steel construction makes them susceptible to oxidation if not kept in dry environments.
| Colour | Black |
|---|---|
| Model Part Number | DIN 912 |
| Brand | Unifix |
It refers to the mechanical properties of the steel, indicating a high tensile strength of 1200 MPa and a yield strength of approximately 1080 MPa.
No, these are high-strength alloy steel. They should be used in dry, indoor environments or coated with protective lubricants.
They are not recommended for outdoor use unless they are coated or treated, as they will rust quickly when exposed to elements.
You need a standard metric hex key (Allen key) that fits the socket size specific to the diameter of the screw.
DIN 912 is a technical standard that specifies the dimensions and tolerances for socket head cap screws, ensuring global compatibility.
Ensure you are using the correct metric size hex key and that it is not worn out. If the socket is damaged, remove using an extractor tool.
Clean the internal threads of the hole with a tap and verify the thread pitch matches the screw specifications.
Clean the surface with a wire brush, apply a light coat of machine oil, and move the assembly to a lower-humidity environment.
For optimal results, use a high-quality hardened steel hex key to avoid rounding out the socket head during torque application. It is recommended to use a torque wrench to meet the specific requirements of your assembly, as over-tightening can compromise the fastener or the housing material. Since these are black-finished alloy steel, keep them stored in a dry environment and apply a thin coating of anti-seize or machine oil if the assembly will be exposed to fluctuating humidity. Ensure that the thread pitch and diameter match your tapped hole exactly, as mismatched threads will permanently damage the assembly.
