Correct Lug Nuts for Pacer Wheels

I bought a set of used pacer wheels 022-6181U that are no longer made so i cannot find any information on them. My question is what lug nuts do these use? if they do use the 60 degree tapered ones do i need 14mm x1.50RH or 14mm x2.0RH lug nuts? Im not sure what the "RH" at the end means but im assuming that it is the length? The lug nuts are ressesed in a hole in the wheel a good bit so i was thinkin a longer one. By the way it is a 2004 2500HD if that changes anything. Thanks.