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What Size Is The 70's Gm Alternator Pulley Nut? |
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Answer» The older DELCO 10DN, 10Si, and 12Si (and 15Si through DR44G) series ALTERNATORS have a 17mm pulley shaft and a very ODD SIZED nut. It looks like an M17 metric THREAD, but it is actually an imperial decimal thread, .668-20. The older Delco 10DN, 10Si, and 12Si (and 15Si through DR44G) series alternators have a 17mm pulley shaft and a very odd sized nut. It looks like an M17 metric thread, but it is actually an imperial decimal thread, .668-20. |
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