| Also known as | F3665 |
| Diagram | Fig. 15 — SWINGING ARM - CENTRE STAND - REAR BRAKE CONTROL · ref 10 |
| Subsystem | exhaust |
| Listed in parts books | 1960–1962, 1968–1969, 1973 |
Stud (4 1/4 in. O.A.)
A 4 1/4 in. overall length stud, Triumph part 82-3665 (formerly F3665), used across several engine and exhaust fitting locations.
This is a stud, 4 1/4 inches overall length, listed under Triumph part number 82-3665 (the earlier form of this number was F3665). It shows up across several catalog sections, including swinging arm/centre stand/rear brake control, engine fittings and exhaust system, and general engine and gearbox fittings, which tells you it's one of those general-purpose studs Triumph used in more than one spot rather than a single dedicated fastener.
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Because the catalog places it in multiple figures spanning engine mounting hardware and exhaust fittings, the exact spot on your particular machine is worth confirming before you order rather than assuming from the part number alone. It's a plain threaded stud meant to hold two components together with a nut on each end, the kind of hardware that's easy to lose track of when an engine or exhaust comes apart for service.
If you're chasing this part to replace something on a bike built between 1960 and 1973, it's worth double-checking against your parts book diagram since the figure titles suggest it could be doing engine-plate, exhaust, or brake-control duty depending on the machine. Ed can help confirm which application matches your bike if you give a call.
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