Found these the other day and from I found out there are Aviation Cannon Plug Pliers.
Its the only pair I've seen so I had to snag them.

looks like they would work on stubborn radiator hoses , or the 60s Ford fuel filters.

There is a similarly shaped UTICA No. 529 pliers with rubber faced smooth curved jaws -- they were intended for manipulating larger size vacuum tubes.  Anyone have a 1940s - 1950s vintage UTICA catalog to see what else could be out there?

Hey, cool!  Now you can maintain the cannons on your Hawker Siddeley Harrier, or F-104, or whatever plane you use to alert your neighbors that their dogs are barking too darned loud.

Ahh... Lockheed F-104 Starfighter ....

Some fellow from NATO would like to know how many craters you would like in your parking lot...

Cannon is a type of electrical connector. Think of an electrical cord end with 25 pins instead of 2 or 3.

With all those pins it can be real hard to plug in or unplug the connector, hence the specialty pliers.

Chilly

I found this Utica catalog at
https://archive.org/stream/UticaToolCatalog/uticatoolcatalog#page/n0/mode/1up

It lists both the 527 and 529 (with the nylon inserts).

It's catalog No. 661. Couldn't find a date but it has to be 1967 or after as that is the last date mentioned on the history page.

Great info, Bus!! Thanks!

Dang, the kid in me wanted to play with a cannon.

That's a lot of great info. thanks guys.

Very good!  I have one of those in my toolbox but did not know the intended purpose.
Thanks!
Al.

Quote from: HeelSpur on May 15, 2014, 02:30:57 PM
Dang, the kid in me wanted to play with a cannon.

The kid may like playing with a cannon (my kid does too!), but the adult will fall for these pliers as well. 

I've had a pair for 15 or more years, and they earned a prominent place on my bench.  You know those
"safety" lids on cans of thinner, linseed oil, etc?  The ones kids get around easily enough but drive us
nuts getting them off?  Not any more.  These are the go to tool for getting those lids off!