[ihbuilder]

use an x ring IOW , the profile will look like an x instead of O I get them off McM. thats what they're called . yes my glands are threaded . Next 1's will bolt like Ari's . If I where you , I'd ditch the Alum. all together and go brass . much easier to work with for making cylinders . It hones nicer you can buy the tube (seamless) make the ends and silver solder them together . What grade alum are you using ? If your going to stay with alum. use 6061-T65 or 7075 - ? (Slipped my mind ) . you get a much better finish then hardware grade crap .