[TenTec] Size of Ten-Tec grounding bolt

[Winston]

I’m planning on buying some tinned copper grounding straps to tie together the ground lugs on my equipment.
I have an Omni VII, Jupiter, 229 tuner. They all seem to have the same size grounding bolt, but nowhere in the manuals can I find the size.
What size lug should be on the braids’ ends? 1/4” or 3/8” or something else?
73, Winston K4CWQ

Sent from my iPhone