| Diagram | Fig. 13 — FRAME — BATTERY CARRIER — ENGINE SHIELD · ref 43 |
| Subsystem | electrical |
| Listed in parts books | 1971 |
BSA Bolt — engine fixing, front (7/16" UN.F. × 3¼")
A 7/16 in. UNF, 3¼ inch front engine mounting bolt listed with frame and battery carrier hardware.
This is a 7/16 in. UNF bolt, 3¼ inches long, listed in the catalog as an engine fixing bolt at the front of the mounting arrangement. The parts-book entry groups it with frame, battery carrier, and engine shield hardware, so it's doing structural duty holding the engine to the frame rather than anything electrical, whatever the internal filing might suggest.
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The catalog record for this one is thin — it only turns up in a single listing, tied to 1971. We don't have more detail on model fitment beyond that, so if you're matching this up to a specific machine, best to compare the bolt in hand (length and thread) against what you're pulling out before you order.
If you're not sure this is the right bolt for your setup, give the shop a call and we'll go over it with you before you commit to an order.
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