On a 1950's GMC truck.
It's a large oil bath air cleaner typically used on big trucks.
Judging by the picture provided, it looks special-made.
The band or clamp may be spot welded to the air cleaner at a few points.
There are 2 square nuts held captive by the band.
The tightening rod is probably 8 inches long and threaded about 3 inches on one end.
You can find generic v-bands at parts stores or on the Internet. ​
They are used on plumbing for turbos (hi-tech engines) and exhaust pipes (tractors etc.).
Most likely you will have to modify the clamp to fit your purpose.
Last edited by buoymaker; 10/19/2021 6:37 PM.
