They are correct about them fitting 1/2 ton only. I know the one ton clips are larger as I have both clips here.
As for 6 per side, I’d have to check an original rim at the farm. The one ton rims only had 4 per rim, alternating after each lug hole. I’d like to think that 1/2 ton would need 3 per rim. You would want to be able to pull them off, right? 😉