Odd shaped 3/8 in. socket

[19Fordy]

I found this 3/8 in. drive socket with both flats and hex. I never saw one before. It appears that it was originally made as a hex socket but, then went through one more manufacturing step whereby every other raised hex was pressed down and removed. The only marking is USA. No size is specified but, it measures 1 in. across the inside flats. Any ideas as to its maker or origin? Thanks.

[KiWinUS]

Oil pressure sender socket for certain types.

[Doublepumper]

Don't know for sure, but I believe it's a socket for an elect. oil pressure sensor.

[Mart]

Or maybe hydraulic brake switch??

[19Fordy]

THANK YOU very much for the responses. It sure does qualify as an oil filter sender socket or brake switch socket. I learned something new today. No more Channel Locks. Thanks, Jim
https://www.amazon.com/Performance-T...e%2C124&sr=1-8

[Ggmac]

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Oil pressure sender socket .

[hueyhoolihan]

a godsend is what this was!

https://www.npdlink.com/product/oil-...fitting/107487

[farmertom]

Originally Posted by 19Fordy

I found this 3/8 in. drive socket with both flats and hex. I never saw one before. It appears that it was originally made as a hex socket but, then went through one more manufacturing step whereby every other raised hex was pressed down and removed. The only marking is USA. No size is specified but, it measures 1 in. across the inside flats. Any ideas as to its maker or origin? Thanks.

19Fordy, don't know about the strange socket,never seen one but i had one of those old life guard stanley tape.yours has alot of miles on her. mine was so warn hardly read anymore. alot of measure 4 times cut or drill once.

[19Fordy]

farmertown: ACE Hardware still sells those tapes.
https://www.acehardware.com/departme...ools_All_Other