are you shure? i had a 1/2" thread at the front bumper where my winch plate is mounted. but i drilled it out to a M12 thread.
M16 would be great. then the hook that i want is strong enough with 15.000 lbs maximum load.
it´s a bad pic. it´s not pink but red.
but i´ll buy another one. it has more maximum load: