What the heck is this odd socket?

[Private Lugnutz]

I'm stumped on this attachment. It's 1/2-inch drive. I have no experience or even a remote inkling what the shape of that blade/key is meant to fit. It may not even be factory. It kinda sorta looks like a drag link bit that someone may have modified with that round nub in the middle. No. 8T-15501. The 8T-xxxxx format is ringing distant bells like I should know what it is, but I am blanking on that, too. If it helps, there was a box wrench crowfoot type attachment that I thought I grabbed and inadvertently left behind that was also an 8T-xxxxx number.

 

[msharley]

Hey PL,

Some heavy equipment (caterpillar, case...etc) used a slotted drain plug on some of the items....(crank case drain for pony motor?)

Hydraulic cylinders....reservoirs ....gear case covers....

Hope this helps...

Later, Mark

 

[Stillgottimefor1]

Looks like an oil pressure relief valve tool. The round piece goes on the ball valve and that holds the tool centered while removing the valve….I’m usually wrong on this forum…

 

[Private Lugnutz]

Thanks, guys. Better guesses than zilch.

 

[Jim C.]

Looks a bit like a clutch head configuration.

Jim C.

 

[Old Man Roger]

You usually answer these type of threads, not start them. Get off my lawn..lol

 

[Private Lugnutz]

Looks a bit like a clutch head configuration.

My clutch head drivers have the opposite shape, Jim. More like an hourglass.

You usually answer these type of threads, not start them. Get off my lawn..lol

That's funny. But seriously, I am not immune to whatzists from time to time.

 

[Jim C.]

Lugz,

I’m aware of two different shapes of clutch head drivers. Look closely at the one on the left and the three sockets.

Jim C.

 

[Private Lugnutz]

Thanks, Jim. Very interesting and I can definitely see a resemblance. (My clutch heads are all like the one on the right, and from the late 30s and 40s.)

 

[wrenchguy]

Some kind of machinery key, chuck key????

 

[RTM]

I have an electrical panel key which looks like that, except there is a hole in the center of the rod. Wonder if it’s a vintage version of something like that.

 

[d42jeep]

Thanks, Jim. Very interesting and I can definitely see a resemblance. (My clutch heads are all like the one on the right, and from the late 30s and 40s.)

Here is an Apex clutch head driver with that unusual shape.
-Don

 

[Private Lugnutz]

The cross recess piece is a little narrower on the socket, but Jim's theory has as much merit as the others at this point. I was hoping the 8T-xxxxx format might be the codebreaker. I do see some Caterpillar tools and accessories come up googling "8T-", but they look more modern, and none of the tools on macaxis's (go 'head, say that three times fast...) Cat thread have that format.

 

[Farmer J.]

I have an electrical panel key which looks like that, except there is a hole in the center of the rod. Wonder if it’s a vintage version of something like that.

I too have a panel which uses a similar key it also has a hole in the centre. I did a quick search of electrical panel/enclosure keys and these are called 'double bit keys'.. then found this supplier which refers to it and similar ones as a 'safe key'.. So, maybe it's something to do with safes?

L & F - Double Sided Safe Blank

Manufacturers: L&FApplications: Safe

jma-uk.co.uk