I have had this thing forever. I alway thought it was clutch linlage from a 49 Ford. Not any more. It is really strange with the keyed washer and the cupped nut. I thought if would be fun to see what people thought it could be.
An axle with a conical (bearing seat) nut thing, a thin lock nut, and a washer- all from a 1942 Huffy girl's bike, model unknown.
Not Bendix, they don't use that type of cone. Looks like generic rear hub, could be from just about any hub that probably used a screw-on freewheel. As for the threading, bicycles, depending on where they're from, can really surprise you. If you go back to the 60s for British, and the 70s for French or Italian, or before, you'll quickly find that it ain't just "standard" or "metric". A bike from Asia will be all metric, except the pedals are 1/2" or 9/16", and the ball bearings are typically 3/16" or 1/4", sometimes 5/32". Try that same pedal in a French bike from the 70s or before, and it'll thread in, then strip out when you ride it. Old French handlebar stems are .2 mm smaller in diameter that almost everything else. Rear gears don't interchange. Then there's Italian threads, also different. What's a Swiss thread? For bottom brackets ( where the cranks go ) a Swiss thread is a reverse French thread. That's the tip of the iceberg. Forget math class. In the bike world, a tire marked .75 isn't the same as one marked 3/4. Some tires marked 28" are smaller than the typical old "10 speed" size of 27". There are many reasons that old bike dealers are insane. These are just a few. That axle is just an old axle, nothing special. I've got literally 100s of the old ones at my shop, and nobody every needs them. The bins are full of weird little variations. Sorry for being O/T. Saw the thread wasn't going away, thought I'd chime in. Bike shop owner since the 70s. I used to be normal before I got into this business.