TOOLFREEQ
Well-known member
It looks like an oil sending sensor socket.
Iam sure someone knows what the socket is for I have looked and cannot find anything. 3/8 drive opening measures 1 3/16th. I think it is some type of sensor socket. Challenger by Proto -524 are the markings
The T47 really is "special". There is also a similar-size, similar-design six-lobe socket that is NOT interchangeable--GFTX500E is the latest version, earlier ones were FTX500x. Far as I know, both these tools--the T47 and the other one--are both primarily used with GM seat belt bolts and door strikers.
The T47 really is "special". There is also a similar-size, similar-design six-lobe socket that is NOT interchangeable--GFTX500E is the latest version, earlier ones were FTX500x. Far as I know, both these tools--the T47 and the other one--are both primarily used with GM seat belt bolts and door strikers.
https://store.snapon.com/TORX-174-S...TORX-174-GM-Style-Industrial-T47-P631940.aspx
![]()
Note the difference in the lobe shape between the "Torx T47" and the '500E.
Thank you.

This is an interesting thread, so I’ll give it a bump. This is a Snap-On S6224, which is a 6 inch long 3/4” impact socket for caging the brakes on air-brake equipped trucks. As someone else mentioned, probably what your “double deep” was made for. They save a ton of work, as the alternative is cranking with a wrench. For reference, I placed a regular 1/2” drive deep 3/4” socket next to it.Ok, so I threw a wrench in the works.
These all (except the long hex) came out of the '58 Craftsman box I got yesterday. Not sure why you'd need a 21" long 1/4" hex socket, or how about a "double deep well" 3/4" socket![]()




