| Diagram | Fig. 27 — PETROL TANK (STEEL), TWIN SEAT · ref 19 |
| Subsystem | fuel |
| Listed in parts books | 1970 |
BSA Mounting bolt, 2 gallon (5/16" British Standard Cycle)
Mounting bolt for a 2 gallon steel petrol tank, 5/16 inch British Standard Cycle thread.
This is a mounting bolt for a 2 gallon steel petrol tank, threaded 5/16 inch British Standard Cycle. It shows up in the petrol tank and twin seat section of the parts book, which tells us it's used to secure the tank down onto the frame mounts rather than anywhere in the engine or gearbox.
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The catalog only shows this one appearance, tied to 1970, so we don't have a wider fitment picture beyond that. If you're matching up hardware on a 2 gallon steel tank job, this is worth having on the bench, but check it against what's actually on your bike before you order.
Call the shop if you want us to confirm this bolt fits your particular tank setup — the catalog record here is thin, so we'd rather look closer than guess.
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