r/Tools • u/Why-Innuendo • 10d ago

Unique wrench size

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This wrench was in my father-in-laws toolbox, which was left to me. Just noticed it is 13/32, which I’ve never seen before (or a 13/32 nut, for that matter!)

Wife’s grandfather was a machinist, so I imagine that’s where it came from.

I just think it’s cool, and though I’d share it here!

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u/steelartd 10d ago

These weren’t uncommon when I started out in the 70s. There were brass air line fittings that size.

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u/Why-Innuendo 10d ago

Were those brass air lines in vehicles?

3

u/steelartd 9d ago

Yes. Any truck with air brakes used them. In 1978 Weatherhead was the dominant brand of brass fittings used on Ford, IHC, GMC, etc and they had several nuts with the X/32” dimensions.