I've looked at those options, and also 40 caliber brass shells which are just a bit small, but can be formed out. I really want to find these fittings. On Mon, Oct 26, 2015 at 7:12 AM, William Bross wrote: > As a follow-up, check out this site: > > < > http://www.mudhole.com/Rod-Building/Ferrules/Reinforced-Brass-Ferrules-Ch= rome-Plated > > > > They have one that has an 11.0 mm insert, which is just a smidge smaller > than 7/16. I just can't discern from their picture if the insert is > actually closed end. > > Anyway, things like that. > > Bill > > smplx wrote: > > >On Sun, 25 Oct 2015, David VanHorn wrote: > > > > > > > >>I need some help sourcing the metal fitting in the picture: > >>http://ecx.images-amazon.com/images/I/310e-2lm8RL._SY355_.jpg > >> > >>It's 7/16 OD, thin wall brass. It matches K+S stock tubing except that > the > >>end is rounded off and closed. > >>http://www.hobbylinc.com/htm/k+s/k+s8137.htm > >> > >>The diameter is critical, the fitting it goes in doesn't flex much. > >> > >>I am not too picky on length, more than half is good, more than an inch > is > >>a problem. > >> > >>A hole in the closed end is actually good, but not critical. > >> > >>Why: > >> > >>I have an antique "Violet Ray" device that I would like to make some en= ds > >>for. It's a rare one, which runs from 32V "farm current". Such device= s > >>were made by the truckload around the turn of the century, to cure > whatever > >>ailed you, but the vast majority are 110 or 220V for europe. The farm > >>current device is unique. > >> > >>I could just go buy something like in the pic, but I want to make > something > >>more like a geissler tube, which is a bit of a project. To that end, > I've > >>taken up glassblowing, found a source of uranium glass, built a vacuum > >>manifold and "filling station" and learned to seal off these tubes when > >>under vacuum of 1-10 torr. > >> > >> > > > >If you've gone to the trouble of taking up glassblowing why not take the > >final (tiny) step and make your own ends? You say the "k+s8137" matches > >except for the closed end. Simply get some brass sheet and hard solder i= t > >to the end or the brass tube with a small gas torch. This is not the usu= al > >low melting point solder used in electronics. Look up hard soldering > >(melts at about 600+ deg C). This will give you a square end that you ca= n > >easily round off using a buffing wheel. Depending on the radius of the > >curve that you want, just increase the thickness of the brass plate (or > >build up thickness using multiple plates). I've used this technique to > >make rounded end caps out of sterling silver sheet (no pre-made tube jus= t > >rolled up sheet) so I can safely say that it does produce good rounded > >ends. > > > >Regards > >Sergio Masci > > > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .