| Also known as | 0642A, H1065 |
| Diagram | Fig. 16 — TELESCOPIC FRONT FORK, 6T & T110 · ref 34 |
| Subsystem | forks front |
| Listed in parts books | 1960–1962 |
FORK TUBE NUT 57-63 - DRILLED 90' FOR DAMPER ROD RETAINING PIN H1066
Fork top nut for Triumph telescopic forks, cross-drilled 90 degrees for the damper rod retaining pin.
This is the fork top nut off a Triumph telescopic front fork, catalog listed for the 6T and T110 fork assembly and covering the 1957-63 span. It's the cap that threads onto the top of the fork tube, and it's drilled at 90 degrees to take the damper rod retaining pin - that cross-hole is the detail that tells you you've got the right one, since not every fork top nut is drilled the same way. The old book number for this one was H1065, with H1066 referenced as the mating damper rod retaining pin.
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Because this part carries a cross-drilled hole for a retaining pin, it's not interchangeable with a plain fork top nut - if your fork uses a different damper rod arrangement, this one won't do the job. The catalog ties it to the 6T and T110 fork figure across 1960-1962 in our records, so check what your fork actually has before ordering.
If you're rebuilding a set of forks from this era, it's worth pulling the old nut and comparing the hole pattern before you commit to this part number - fork top hardware changed around enough over the years that a quick look saves a return trip to the counter.
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