| Also known as | F3771 |
| Diagram | Fig. 14 — ENGINE UNIT FITTINGS AND FOOTRESTS · ref 37 |
| Subsystem | frame |
| Listed in parts books | 1960–1962, 1964–1965 |
NUT,SHOULDERED REAR ENGINE MOUNT
Shouldered nut for the rear engine mount on unit-construction Triumph twins, positions the gearbox adjuster eyebolt.
This is the shouldered nut used at the rear engine mount on unit-construction Triumph twins, part number 82-3771, also cataloged under the earlier F3771 designation. It shows up in the parts books under Engine Unit Fittings and Footrests, where it does the job of securing the rear engine plate stud while its shoulder feature keeps the adjuster eyebolt positioned correctly at the gearbox top clamp.
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Our catalog record for this one only shows a single listing tied to 1964, so treat that as what we can confirm rather than the full range this nut was used across. It's a small, easy to overlook part, but a worn or wrong nut in this spot can let the engine plate hardware shift, so it's worth checking against your existing nut before you order.
If you're working from an older parts book and see F3771 instead of 82-3771, that's the same physical nut under its earlier reference number.
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