Okay, so the m10 nyloc's won't fit as they appear to be just a little too big for the drive shaft... thankfully I used the glue gun and not the epoxy resin right off the bat. And sadly to say, the glue won't stick, so it'll have to be epoxy.

So I contacted R9000, and he said just look on eBay for some 3/8 unf imperial nuts, which I'm currently doing right now.

The only problem is... I'm not sure if I should go with these (LINK), these (LINK), or these (LINK).

Help would be greatly appreciated.