[SML] What is this cap called?

[billn at peak.org]

> See, that's the problem - the connection to the cap is riveted on, and
> I can't merely drill out the rivet and rivet a new chain on - inside
> the cap is a rubber seal, and anything that protrudes into the cap
> will interfere with the rubber seal, and in turn poke into the
> connectors... it would need to be flush, like the factory-applied
> rivet that was (is) there now. Replacing the chain is the hope, but I
> can't figure out a way to do that without using user-serviceable
> mechanical fasteners on the cap side.

Can you temporarily remove the rubber seal?

If so, you could drill a bolt hole through the center and countersink it on
the inside. Then epoxy the end of a replacement chain to a washer that fits
the bolt and fasten in place with a lock-washer and nut.

Bill