Originally Posted by TejanoTrackie

Lots of confusion and mixed metaphors in this thread:

1) No such thing as an allen nut. A "nut" is an internally threaded fastener that mates with an externally threaded item such as a solid axle. A "nut" has the wrench flats on the outside. An "allen" fastener is externally threaded with internal wrench flats and is technically a "bolt". You cannot connect two externally threaded fasteners (bolts).