admins please delete if inappropriate... After searching for vintage style thumb screw hose clamps I came across a shit ton on an Internet website. Not made is USA but reasonably priced and have a hole in tab for safety wiring. I am in NO way affiliated with these folks just trying to help some fellow hambers out .... The site rhymes with " rover stock " dot com ... Again if inappropriate please delete. They shipped fast and had a wide variety of sizes. Have not used them yet so can't speak to quality bit from what I have seen and clamped on they do what they are supposed to. Good luck