| Also known as | S1915 |
| Diagram | Fig. 1 — CRANKSHAFT AND CONNECTING RODS · ref 21 |
| Subsystem | engine bottom |
| Listed in parts books | 1969–1970, 1974 |
ROTOR NUT 9/16-18 1969-ON 500 TRIUMPH
Sleeve nut, 9/16-18, that secures the alternator rotor to the crankshaft on 1969-on Triumph 500 twins.
This is the rotor nut that holds the alternator rotor onto the crankshaft on Triumph 500 twins. It's a sleeve-type nut, threaded 9/16-18, and it sits right at the end of the crank where the rotor keys on for the alternator.
Read more
The catalog lists this one for 1969-on 500 Triumphs, and it shows up in the crankshaft and connecting rods section of the parts book, which tells you it's tied directly to crank assembly work rather than anything on the primary side. A tab washer is normally used with this nut to keep it from backing off once it's torqued down.
We sell this one individually. If you're rebuilding the bottom end or pulling the rotor for any reason, it's worth having a fresh one on hand rather than reusing a nut that's been worked loose and retightened a few times.
Sorry if we got something wrong here. If you think this information isn't correct, .