Aftermarket Wheel Lugs size?

Got a set of aftermarket lugs for the wheels but they seem to be very tight. It's not damaging the studs but seem like it's not the right size.

The purchased lugs were 14mm x 1.5 threads (looked up the H1 specs and this was the size given).

Also happen to access to a H1 and the lugs on it was 9/16 R t/h which is a soother fit with a very slight play. Some insight would be appreciated.

Thanks

M14 × 1.5 is NOT correct for the HMMWV.

You might read this other thread: https://www.steelsoldiers.com/showthread.php?168179-HMMWV-Lug-Nuts