This hub spacer stabilizer adapter will fit any PMA (Delco 10 si or 12 si alternator with a 17mm shaft). We at Missouri Wind and Solar designed this hub stabilizer spacer to replace the small spacers that come with PMA's /alternators. The hub spacer fits all hubs with a 17mm center, adds support, stops vibration, and stops hubs from bending and flexing in high winds!

Made from high quality steel with a high tensile strength. Gold zinc plated so it won't rust!

Designed and manufactured by a military contractor. Will last a lifetime , as heavy duty as you can get (lifetime warranty).

We make our products with your safety in mind! Made in the USA by Missouri Wind and Solar.

This spacer/hub stabilizer replaces the existing spacers and stabilizes the hub on any 17mm shaft of your PMA.

If you are building you own PMA and don’t have spacers, this is all you will need between the bearing and the blade hub.