I was able to reach out to my contact at Lippert, who was able to provide me with the specs of your NV 155773 axle, however it doesn't look like the bearings that were on this hub and spindle configuration are the same ones for the inner and outer bearing.
This particular axle uses the # 25580 inner bearing and # LM67048 outer bearing, so you'll want to use a hub that uses those same bearings (or the same sized bearings) as a replacement. You can use a Dexter hub like the Dexter Trailer... view full answer...
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