Unique wrench size

[u/Why-Innuendo]

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!

[u/Exotic_Dust692]

Square headed nuts and bolts were not uncommon long ago in the agricultural sector. If I remember correctly some of them had those size fasteners.