What's this??

[doan]

Another tool from my grandpa's stuff. He worked on farm tractors and serviced his own tractor-trailer rigs. He died in 1990, so whatever this is, was applicable to stuff made before then.

It's 1/2" drive and was clearly used in an impact wrench. The hex shaft is 7/16" and the end accepts a a 1/4" hex bit. It also has a retainer ring for the 1/4" hex opening.

 

[fitz11]

Looks like a 1/2" square to 7/16" hex adapter with a 7/16" hex to 1/4" hex adapter in it. The pieces separate I assume?

 

[doan]

It's held together with a drive pin. Seems like significant overkill to have a 1/2" drive adapter for hex bits.

I just thought maybe it had some special purpose. I googled "APEX 488", it is still a current part number and it comes up as a 7/16 to 1/4" adapter - without the 1/2" drive piece.

 

[larry_g]

It wouldn't surprise me if that came off of some manufacturing machine. Apex catered to manufacturing.

lg
no neat sig line

 

[nicksnothereman]

For "screw bolts"? Instead of hex end they have philips head but retain with a nut instead of a fixed sleeve or molding like with a "machine screw". Basically, a thicker machine screw with a thicker head. That would be my guess. I see these in electronics sometimes. Probably something industrial. I might just be imagining it though.