The spigot ring bush from the gearbox of a 1968 Ford Cortina 1600?
That'd just about fit your ring finger
( Grrrmachine the indifference engine, Fri 10 Jul 2009, 10:16, archived)

You never know when it might come in useful.

( spangolin - the odds are good but the goods are odd, Fri 10 Jul 2009, 10:34, archived)

Silly Grrr,
spigot bush isn't gearbox component.
( L-Space - scientia sapientes vocat., Fri 10 Jul 2009, 11:06, archived)