| Also known as | F3182, WW73022 |
| Diagram | Fig. 23 — OIL TANK · ref 9 |
| Subsystem | engine bottom |
| Listed in parts books | 1960–1962, 1964–1974 |
NUT UNION 1/4BSPP - GAS & OIL (5/16 BORE)
Union nut, 1/4 BSPP thread with 5/16 bore, used on Triumph oil and fuel line fittings.
This is the union nut Triumph used on oil and fuel line fittings, threaded 1/4 BSPP with a 5/16 bore, part number 82-3182. It's the small hex nut that clamps a banjo or feed pipe fitting down onto the oil tank or petrol tap, and it turns up over and over in the parts books under oil tank, frame, and oil pipe/breather pipe figures, which tells you it's a common item across a long run of years in the shop's records. The legacy alias for this one is F3182, and it also shows up cross-referenced as WW73022 in some listings.
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Because the same nut fitting handled both gas and oil line unions, you'll find it listed against oil tank feed pipes, oil tank breather lines, and similar plumbing throughout the catalog. If you're chasing a leak at a banjo fitting on the oil tank or a pipe union at the petrol tap, this is the nut to check first, and it's cheap enough to keep a spare in the toolbox for when the old one gets buggered up by a spanner.
With 27 appearances across the catalog spanning 1960 to 1974, this is not a rare or one-off part — it's one of the small hardware items that keeps showing up because Triumph used the same union nut in multiple places on the same bike. Confirm which pipe or fitting you're mating it to before ordering, since the nut alone won't do you any good without the matching pipe or olive.
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