Private Lugnutz
Well-known member
They have a really interesting evolution, Don. I found one back in 2019, prompting a mini deep dive. Short version is they were patented by a company called ValTul, not Snap-on, typically came with 3 different sockets for 3 different OHV locknut sizes, and this version, which seems to have been made exclusively for PWA, does not show up in any SO catalogs. The in-house SO versions have wide pot metal knobs. They were 1/2-inch hex drive through 1941, when SO switched to 1/2-inch square drive - a smart move that allowed them to use regular 1/2-inch square drive sockets instead of special hex drive sockets. I don't know if that applied to the PWA-28354 model. Hex seems antiquated, but just the quirky kind of thing PWA might could've just spec-stuck with over the years, including through WWII.This PWA marked push rod adjuster was patented in 1925 but I’m sure it was made around a couple of decades after that.
More reading in a series of threads starting with #1694 on page 43 linked here, but make sure you scroll through down to post #1705, which is a catalog timeline I did, and there are other examples and posts from snapmom and others in between.
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