| Also known as | S1933 |
| Diagram | Fig. 14 — ENGINE UNIT FITTINGS AND FOOTRESTS · ref 13 |
| Subsystem | frame |
| Listed in parts books | 1970–1971 |
NUT 5/16 X 1 LONG SLEEVE
A 5/16 inch long sleeve nut used in the engine mounting and footrest fittings area.
21-1933 is a long sleeve nut, 5/16 inch, that shows up in the parts book under the engine unit fittings and footrests section. Its old book number was S1933, so if you're working from a pre-unit or early parts list and see that stamped on the page, it's the same part as this one.
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A long sleeve nut like this is used where a fastener needs to pass through some thickness of casting or bracket and the extra length gives the bolt more thread to bite into, or spaces two parts apart while still clamping down solid. Given the figure it's listed under, this one is tied into the engine mounting or footrest hardware area.
We don't have more detail on this one beyond what's in the catalog listing. If you're not sure which fitting on your bike calls for it, give us a call and we'll help you match it up before you order.
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