| Also known as | E5269 |
| Diagram | Fig. 13 — SWINGING FORK AND SUSPENSION UNITS · ref 31 |
| Subsystem | primary |
| Listed in parts books | 1963–1966 |
Self-locking nut
A self-locking nut used in swinging fork/suspension and tail lamp/stop lamp switch assemblies on Triumphs from the early-to-mid 1960s catalog era.
70-5269 is a self-locking nut listed in the swinging fork and suspension parts, and it also turns up alongside the stator, tail lamp, and stop lamp switch listings. The self-locking feature means it grips the thread on its own so it won't work loose from vibration, which matters on suspension hardware and small electrical fittings that don't get checked often.
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This one carries the older E5269 number in earlier parts books, so if you're cross-referencing from a vintage catalog, that's the number you may see instead of 70-5269. It shows up across a run of catalog entries covering the early to mid 1960s, appearing in both the swinging arm/suspension figure and the electrical figure, so its use isn't limited to one spot on the bike.
Because it's called out in more than one figure and system, double check which application you're ordering for before you order, and confirm the thread size against what you're removing. We don't have more detail on this one beyond what's in the catalog record.
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