Technical data:
- Thread size: 3/8 inch (approx. 9.53 mm outer diameter)
- Gradient: 26 TPI (gears per inch)
- Thread standards: Complies with UN / UNS / BSC (British Standard Cycle)
- Material: HSS (Industrial Grade)
- Flank angle: 60°
- Cutting direction: Right-hand thread
- Outer diameter: 30.0mm
- Height: 11.0mm
Typical areas of application:
- Bicycle technology: Standard dimensions for many rear wheel axles (solid axles) and gear hubs.
- Vintage car restoration: Commonly found on classic British motorcycles (Triumph, BSA, Norton).
- Plumbing/Gas: Complies with the BSB (British Standard Brass) thread for brass components.
⚠️ IMPORTANT COMPATIBILITY NOTICE
Please note that this threading die features a pitch of 26 Threads Per Inch (TPI).
It is NOT compatible with the common standard 3/8"-24 UNF thread (24 TPI).
While they look nearly identical, they are not interchangeable and forcing them will damage the thread.
How to check:
If you are unsure, please measure your workpiece.
For 26 TPI, exactly 10 thread peaks should measure approximately 9.8 mm (approx. 0.38 inches) in length.
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