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OnBuy.com£13.13Visit shop Unifix A2-304 St/St Cup Square Hex Bolts M8 X 35 - Q206030000800035000 - Box Of 100 5014196640860
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The Range£14.88Visit shop Unifix A2-304 Stainless Steel Cup Square Hex Bolts Din 603 - M8 X 35 (Box Of 100) - White
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These Unifix A2-304 St/St Cup Square Hex Bolts (M8 x 35, Silver) are ideal for DIY enthusiasts and professionals seeking durable fasteners for structural and general projects. Their key benefit is excellent corrosion resistance and a secure grip, though their specific M8 x 35 size means they are suited for particular applications rather than universal use. This guide covers their features, applications, and care.
| Colour | Silver |
|---|---|
| Model Part Number | Q206030000800035000 |
| Brand | Unifix |
A2-304 refers to the grade of stainless steel. It's a common grade, often equivalent to 18/8 stainless steel, known for its good corrosion resistance and suitability for general use, including outdoor applications.
The cup square head has a slightly domed top (cup) and a square shape underneath. The square part bites into the material it's fastened against, preventing the bolt from turning when a nut is tightened on the other end. This provides a secure and stable connection.
Yes, the A2-304 stainless steel construction provides excellent resistance to corrosion, making these bolts suitable for a wide range of outdoor applications.
You should use standard M8 nuts and washers. An M8 washer provides a larger surface area to distribute the load, and an M8 nut will have the correct thread pitch to engage with the M8 bolt.
A2-304 stainless steel is generally considered non-magnetic or weakly magnetic. While some slight magnetism can be present after manufacturing processes, they will not strongly attract magnets.
DIN 603 is a German standard that specifies the dimensions and requirements for cup square bolts (also known as carriage bolts). Using bolts that meet this standard ensures consistency and reliability in their design and performance.
Ensure the square portion of the cup head is fully seated into the material or a pre-drilled recess. If the hole is too large, the head may not be held effectively. Consider using a washer under the nut for better pressure distribution.
Verify that you are using a standard M8 nut and that the bolt's threads are clean and undamaged. Check for any obstructions in the nut's internal threads. Ensure the nut is aligned correctly with the bolt's axis.
A2-304 stainless steel is highly resistant but not completely impervious. Check for damage to the surface finish or contamination from other metals. Clean the affected area with a non-abrasive cleaner and rinse thoroughly. For persistent issues, consider the environmental conditions or if a different grade of stainless steel might be more appropriate for extreme exposure.
Setup:
These bolts are designed for straightforward installation. Ensure you have the correct size drill bit for the M8 diameter hole. The square head is designed to be held in place while a nut is tightened on the threaded end. A spanner or wrench will be needed for the nut.
Compatibility:
These bolts conform to the DIN 603 standard. They are compatible with standard M8 nuts and washers. The A2-304 stainless steel is suitable for use with a wide range of materials, including wood, certain plastics, and metals, particularly in environments where corrosion is a concern. Avoid use with materials that may cause galvanic corrosion when in direct contact with stainless steel over extended periods in a damp environment.
Care:
While A2-304 stainless steel offers excellent corrosion resistance, it is not entirely immune to damage or staining under extreme conditions (e.g., high salt concentrations, prolonged exposure to harsh chemicals). Regular cleaning with a damp cloth is usually sufficient. If mineral deposits or stubborn marks appear, a mild soap solution can be used, followed by rinsing and drying. Avoid abrasive cleaners or steel wool, which can scratch the surface.
