| Also known as | E8133 |
| Diagram | Fig. 2 — CRANKCASE · ref 9 |
| Subsystem | engine bottom |
| Listed in parts books | 1968, 1970 |
Union nut
A union nut fitting used at crankcase, frame, and front fork joints, cataloged 1968-1970.
The 70-8133 is a union nut, also cataloged under E8133 in the older letter-prefix numbering. It shows up across a handful of figures in our books, including crankcase and frame listings as well as front fork drawings, which tells us this is a fitting used in more than one spot on the machine rather than a single dedicated location.
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A union nut like this is used to draw a pipe or fitting up tight against a mating face, sealing the joint as it's tightened down. Because it turns up in several different figure groups, don't assume the one you're holding is interchangeable with every other listing under this number without checking the specific assembly you're working on.
Catalog appearances for this part run from 1968 to 1970. We don't have thread size or material spelled out in our records for this one, so if you need to match it exactly, bring in the old part or give us a call and we'll sort out fitment before you order.
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