Lug Nut Question w/ Regard to TRD Pro Wheels

I have twwo TRD Pro wheels and tires to go on my overland trailer. The trailer has hubs that that have 6 x 5.5 lug pattern, but the lugs are 1/2 inch instead of 12mm.

Currently the lug nuts on my 4R have an attached washer. I have been unable to find matching style lug nut for a 1/2" lug, that also has the attached washer.

Is the attached washer critical for the TRD wheels to stay mounted to a 1/2 inch lug, or can I use a standard style lug nut?

Thanks in advance for the help.

 

Autozone and advance sell a ton

 

Are you able to answer my specific question regarding the washer?

 

I’m sure you can use a standard lug and add a washer, but there are plenty of sets out there...

 

Thanks