This is a really small stepper motor, but as far as I understand it it *not* the normal dimensions for a NEMA 8 Engine. Most of the specs I've seen say that a NEMA 8 motor should have a 16mm bolt spacing and a 15mm guide ring. This has a hole spacing of 15.4 mm and a guide circle of 16 mm. Just check if it's right for your application.
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