I need a shower arm that is metal that has a screw on flange. This helps to secure the shower arm to the from of the shower stall side then through the wall where it is then screwed into the water supply. I have a plastic one but it is old. I tried a newer on that just sticks through the wall and screws into the pipe but it wiggles around. Any help will be appreciated. The arm is about 5" to 6 " long.

This won't help much. The shower arm's secured by a drop eared ell,(see image) that's screwed into backing. However you may purchase a chrome escutcheon plate with a locking screw that you may install. However, the shower arm will still act loose unless securedby the drop eared ell. If you can not locate a chrome escutcheon plate with a locking screw cxlick on back and I'll give you a link. Regards, tom

Thank you speedball 1, I will need that link.

No sooner asked then done. RecSupply.com Escutcheon Plate - Chrome Plated Bronze
Good luck, tom