| Also known as | W1690 |
| Diagram | Fig. 20 — REAR WHEEL · ref 12 |
| Subsystem | wheels |
| Listed in parts books | 1966–1969 |
Bolt (3/4 in. U.H.)
A 3/4 in. under-head bolt used in the rear wheel/brake drum-to-hub hardware set on the rear wheel.
This is a 3/4 in. under-head bolt that shows up in the rear wheel section of the parts books, tied to the bolt-on brake drum arrangement at the hub. The legacy alias W1690 is the same physical part under the older letter-prefix numbering.
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It's one of the small hardware pieces that gets overlooked until it's missing or rusted through, but it does real work holding the drum to the hub, so it's worth checking condition and thread engagement when you have the wheel apart.
Our catalog record ties it to rear wheel work across appearances from 1966 to 1969. Check your own parts book listing against what's on the bike before ordering, since hardware like this can vary by year within that span.
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