by droopsnoot » Sun May 05, 2019 6:20 pm
I'm not sure I'd like the sound of that. The major diameter for an M12 constant pitch bolt with 1.5mm thread pitch is, as you might expect, 12mm, whereas for 7/16 UNF it's 0.4375", which is 11.1125mm. So if it's a nut sold for an M12x1.5 thread, it's almost 1mm larger diameter than the 7/16 UNF fitting. The UNF thread is also 20TPI, which equates to around 1.27mm pitch rather than 1.5mm.
Are you sure they don't do both, and send whichever you need? Surely that has to be the case - would a 1.5mm pitch nut even screw down onto a 1.27mm bolt?
Now I've looked at it, that link seems OK as they're 7/16UNF thread. I'd be annoyed at having to use a 19mm socket instead of a proper 3/4" one, but it'd be better than nothing of course.