| Also known as | T999 |
| Diagram | Fig. 10 — CLUTCH · ref 19 |
| Subsystem | primary |
| Listed in parts books | 1960–1962 |
CLUTCH SPRING 3T/5T 1.87
Clutch spring for pre-unit Triumph twins, 1.87 length, legacy number T999.
This is a clutch spring for pre-unit Triumph twins, listed in the parts book under the 3T/5T grouping with a length figure of 1.87. It's one of a set that lives inside the clutch, providing the spring pressure that keeps the clutch plates engaged so power gets to the gearbox instead of slipping.
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The legacy number for this one is T999, which you'll still see printed in older parts books alongside the modern 57-0999 stamp. If your book lists T999, you're looking at the same physical spring.
We don't have a lot of catalog history on this specific line, so if you're not sure your clutch uses a spring of this length, give us a call before ordering and we'll help confirm what your setup takes.
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