A lot of pickups had 1/2" tubes if they were 3/4 ton, there were also a lot of 5/16 and 1/4 tubes in lighter duty applications.

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!