I've Googled this extensively and found conflicting information. The two bikes of my specific concern are an Electra cruiser (7-speed solid axle rear and solid front axle) and an Electra Townie (Modern [Shimano?] rear threaded COASTER BRAKE axle).

Most sites are in agreement that the font axles will all be 5/16" x 26 TPI, although I've seen some that said 9mm (without specifying a thread pitch).

Sites differ significantly about the rear axle threading.

Some say ⅜" x 26 TPI, others say ⅜" x 24 TPI, and some say 10mm metric (without specifying a thread pitch).

Since I don't have a thread gauge, does anyone know what this threading will be? Note that there are TWO rear axles of interest - the 7-speed and the coaster brake.

I understand that the Sturmy-Archer coaster brakes may (or may not) have a different axle than the Oriental ones. The SA models are of only academic interest to me at this time.

Thanks kindly - FH