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The Unifix A2-304 Stainless Steel Hexagon Bolts M20 x 100 are professional-grade fasteners designed for heavy-duty construction and engineering applications. Engineered for superior durability and corrosion resistance, these bolts are ideal for structural projects where reliable fastening is critical. While they offer excellent longevity in harsh environments, they require careful torque management to ensure they are properly seated in high-load applications.
| Colour | Silver |
|---|---|
| Model Part Number | Q209310002000100000 |
| Brand | Unifix |
A2-304 is a common grade of stainless steel that provides excellent corrosion resistance for general outdoor and industrial use.
While A2-304 is rust-resistant, it may eventually show surface rust in high-salt marine environments; consider A4-316 grade for direct salt-water exposure.
DIN 931 indicates that the bolt is partially threaded, which is standard for structural applications where a smooth shank is required for shear resistance.
You will require a 30mm spanner or socket to effectively tighten an M20 hexagon head.
Generally yes, provided the threads remain clean and free from signs of structural deformation or galling.
The stainless steel threads may be galling; back the bolt out, clean the threads, and apply an anti-seize lubricant before attempting again.
Ensure you are using a perfectly sized socket or spanner to prevent slippage; the large M20 head requires significant surface contact.
For optimal results, ensure the hole diameter is matched to the M20 specification to prevent unnecessary vibration. When installing, it is recommended to use a compatible washer to distribute the load evenly across the surface of the material. Given that these are stainless steel, avoid using high-impact force that could cause the threads to bind or gall. Regularly inspect fasteners in high-vibration environments and apply a light coating of anti-seize paste if you anticipate needing to remove the bolts in the future for maintenance.
