| Diagram | Fig. 21 — REAR MUDGUARD AND CHAINGUARD · ref 1 |
| Subsystem | primary |
| Listed in parts books | 1969–1970 |
BSA Bolt, chainguard to swinging arm (1/4" British Standard Cycle × 2")
1/4 inch BSC bolt, 2 inches long, for mounting the chainguard to the swinging arm.
This is the bolt that secures the chainguard to the swinging arm, listed in the parts books under the rear mudguard and chainguard section. It's a 1/4 inch British Standard Cycle bolt, 2 inches long, the kind of small fastener that's easy to overlook until you're chasing a rattle from a loose chainguard.
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The catalog entries for this one run 1969 to 1970. If you're rebuilding the rear end of the bike and pulling the chainguard off, it's worth having a couple of these on hand since they're the sort of hardware that gets lost or buggered up with a wrench over the years.
Check the thread and length against what's on your bike before ordering, since fastener specs on these old catalogs can be terse.
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