That is really interesting. The "Z" prefix tools were generally for commercial usage and were found in dealership service areas and commercial garages. The most common Z tools were 3Z (Model T) and 5Z (Model T and A). I've seen tools with 14, 18, and 20, but never a 19Z before. Some of the higher-number Z tools were for other Ford Models. Very cool!What the heck is this. Model 19Z418. 5/8”. Opening on both sides
What kinds or types of tools were the 3, 5, 14, 18 and 20 "Z" tools? Summarize, please. I'm not asking from the perspective of Ford interest, but from the perspective of it possibly shedding some light on this Walden-Worcester oddball.The "Z" prefix tools were generally for commercial usage and were found in dealership service areas and commercial garages. The most common Z tools were 3Z (Model T) and 5Z (Model T and A). I've seen tools with 14, 18, and 20, but never a 19Z before. Some of the higher-number Z tools were for other Ford Models.
There are some reasons to suspect a very strong maybe. In the same period as @snapmom 's socket, they did make a 1-inch hex drive, with sockets that had cross-drilled holes for turning with a crossbar, and they also experimented with 5/8-inch square drive. It's almost like they converged them.I don't know of any evidence of Walden Worchester making 5/8 hex drive sockets but maybe they did…
What kinds or types of tools were the 3, 5, 14, 18 and 20 "Z" tools? Summarize, please. I'm not asking from the perspective of Ford interest, but from the perspective of it possibly shedding some light on this Walden-Worcester oddball.

^ Wow. I forgot all about that thread. From a slew of different mfgrs, but all of them looking peculiarly very similar (machined, chamfered on the service end, with cross-drilled holes for crossbars!) You didn't say (unless I missed it...), and I can't tell from your pictures: are they 5/8-hex drive? The whole bunch remind me of drain plug sockets from a drain plug set.There's a number of posts on this thread with 19-Z sockets
Subsequent versions of the same tool. 3Z is the earliest and available for the Model T.@Ed in Virginia - are those the Ford part numbers on those items?
whose part numbers are those in the other columns?![]()
3/8, 1/2. 11/16, 3/4, 15/16" etc. I think the hex's were all the same size on both ends even though one side was chamfered and the other flat. Hell, a lot of the square sockets seemed to be the same size on both ends too. The power socket drivers from that same Ford box were 5/8 hex by 5/8 sq. except for 1 that was 7/16 hex by 1/2 sq. though they came in the same box and are marked Ford they don't seem to be specifically for these particular sockets.^ Wow. I forgot all about that thread. From a slew of different mfgrs, but all of them looking peculiarly very similar (machined, chamfered on the service end, with cross-drilled holes for crossbars!) You didn't say (unless I missed it...), and I can't tell from your pictures: are they 5/8-hex drive? The whole bunch remind me of drain plug sockets from a drain plug set.
Right?! we know 19-Z sockets definitely were used on fixed socket ratchets.So possibly from a permanent ratcheting wrench or fixed wrench.
Kind of odd to see Ford on a Walden, but I do have a 3/4 drive Walden socket with the KRW name on it.
That's a neat piece with the huge Ford logo Snapmom.
That explains it, then. A very interesting niche. Not drive tool socket wrenches at all.I think the hex's were all the same size on both ends even though one side was chamfered and the other flat. Hell, a lot of the square sockets seemed to be the same size on both ends too.