Help with Lug Nuts

[oldearl]

Since the local Chevy dealer around here is no help and the tire shops only sell 18 and 20 inch after market wheels.
Can a forum member please advise me on which lug nut to buy to be able to out on the center caps of these type wheels ?
The truck the wheels are on is my 1974 Chevy C 10 long bed. 1/2 X 20 stud ? Kinda short on funds to change all four rims.

Thanks in advance oldearl

You must be registered for see images attach

 

[bucket]

Iirc, the mid to late 90's Astro vans still used 1/2" studs and they also were available with the outside threaded lug nuts for use with those center caps.

 

[HotWheelsBurban]

Iirc, the mid to late 90's Astro vans still used 1/2" studs and they also were available with the outside threaded lug nuts for use with those center caps.

I think I have some of those threaded top lug nuts like you need in 1/2" sae threads. I'll look the next time I'm in my shop building.