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This guide is for mechanics, DIY enthusiasts, and tradespeople who require precise and durable hexagonal fastening solutions. The key benefit is the tool's robust construction from hardened chrome vanadium steel, ensuring longevity and reliable performance, though some users may find the imperial sizing specific to certain applications. Key features include chamfered edges on larger sizes for protection and clear size markings on tools 3mm and above.
| Model Part Number | UTTK11126 |
|---|---|
| Brand | Faithfull |
The Faithfull Hexagon Key is made from fully hardened chrome vanadium steel, ensuring strength and durability.
'A/F' stands for 'Across Flats', which is the measurement across opposite flat sides of a hexagonal head, indicating imperial sizing.
No, only keys from 4mm (5/32in) upwards feature chamfered edges to prevent damage to the blade and fittings.
Yes, all keys 3mm (1/8in) and above are marked with their size for easy identification.
No, this key is designed for imperial (A/F) fasteners. Using it on metric fasteners can damage both the tool and the fastener.
Wipe clean with a dry cloth after use and store in a dry environment to prevent rust and damage.
The chamfered edges help to guide the key into the fastener head more easily and reduce wear on both the key and the fastener.
Verify that the fastener is indeed an imperial size and that you are using the correct 3/4 A/F size key. Using the wrong size can damage both the key and the fastener.
The fastener may be worn, or you may have selected an incorrect size (e.g., a slightly worn metric size that appears close). Ensure a snug fit before applying torque.
Ensure the fastener head is clean and free of debris. On sizes 4mm and above, the chamfered edges should aid insertion; if significant force is required, double-check the size and alignment.
Setup: This is a hand tool designed for immediate use. No setup is required. Ensure you select the correct size for the fastener you are working with.
Compatibility: This hexagon key is designed for imperial (A/F - Across Flats) sized hex sockets. It is compatible with fasteners that match its 3/4 A/F measurement. It is not intended for use with metric fasteners, which require metric-sized hex keys.
Care:
