Just gonna toss a couple of grenades
All the standard bearings in your antique Farmalls and everything else since -ever-, is a metric standard.
Also torque is cumutative, so it doesn't matter. Whether 100 pound-feet or foot-pounds, or pounds-feet, or whatever, it's literally mathematically and physically the same. Someone mentioned 'n' pounds on a one foot lever arm. It's the exact same as a one pound force on an 'n' foot lever arm. The the fundamental premise of leverage. Kinda scary of someone doesn't grasp that fairly instinctively.
Mils are milli-inches. The exact same English (Latin) language prefix as is used to create the word millimeters. It's archaic and uncommon, but it's a thing. It's as goofy (and lazy) as saying thou'.
If any of you say thou' for thousandths, remember that's like them danged kids and their leet speak.