| Also known as | H2290 |
| Diagram | Fig. 16 — TELESCOPIC FRONT FORK · ref 4 |
| Subsystem | forks front |
| Listed in parts books | 1970, 1974 |
PINCH BOLT, FORK TUBE UNF
UNF pinch bolt that clamps the fork tube stanchion into the lower fork end on Triumph telescopic forks.
This is the pinch bolt that clamps the fork tube stanchion into the lower fork end, part number 97-2290, also known by its earlier alias H2290. It shows up in the telescopic front fork parts book pages, including the listing specific to TR6R and T120R forks, so it's a front end fastener rather than anything down in the gearbox or engine.
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The pinch bolt does the simple but important job of squeezing the lower fork end tight around the fork tube so the stanchion can't slip or rotate in the clamp. It's a UNF thread, per the catalog description, and the catalog record spans several years of front fork listings, so it's been used across more than one season of production.
These wear from repeated removal and torque cycles more than most fasteners on the front end, so if the threads look worn or the head is buggered up from a previous mechanic's impact driver, it's worth swapping in a fresh one rather than fighting with the old one.
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