View Full Version : 5/8-18 Thread for Petcock?

06-18-2015, 3:08 PM
So i am building a Roadstar chopper / bobber and bought a 2.2 gal "wasp tank from Denniskirk.... it has a 1/2-20 female left side bung and a 5/8-18 female right side bung. I plan on hanging the petcock off the right but can't seem to find any petcocsk with a 5/8-18 thread??

I was hoping i didn't have to weld a new bung on or whatever but i will if i need to.

Da tank

Da bike
http://i1219.photobucket.com/albums/dd425/brentnaegele/20150616_175849_zpsid6itril.jpg (http://s1219.photobucket.com/user/brentnaegele/media/20150616_175849_zpsid6itril.jpg.html)

http://i1219.photobucket.com/albums/dd425/brentnaegele/20150616_175859_zpsj3obqbvm.jpg (http://s1219.photobucket.com/user/brentnaegele/media/20150616_175859_zpsj3obqbvm.jpg.html)

06-21-2015, 5:49 PM
I checked out his website. 5/8"-18 and 1/2"-20 aren't even a typical petcock thread. The norm is like 22mm like a sporty tank or a 1/4 NPT a 3/8" NPT and even a 1/8"-27. I saw the tank advertised but could not find a petcock to mount to it. Now maybe someone makes petcocks with those threads but I have never seen it. Did u contact them?