So the goal is not to attach end plates, that is the solution. The real goal is a sealed container that can be re-opened. I suggest a trip to the plumbing supply store. Why not just use screw-on end caps
It you need it sealed 4-40 screw are not able to provide any reasonable clamping force. The weak link is the aluminum threads. You need enough force to deform the gasket material and those little screws are not going to do it. If you need a gas tight chamber, look at plumbing parts. They make screw-on end caps with both make and female threads. There is also a system for brazing alumni that work almost as well as celiac welding and you can do it with a propane lumber's torch. They sell the rods at Harbor Freight. Why not post a specification (enclose with x,y,z inside dimension, water/gas tight/ ends on one end,....) and ask people for ideas on the lowest cost way to make that using simple tools. There are SO MANY solutions, one is double sided, coper clad PCB material. You can cut it with a wood saw and then solder the panels together to make a box. I find that I can solder brass screws to copy PCB material and make thread posts or studs. On Thu, May 18, 2017 at 4:13 PM, Andy ZL3AG via time-nuts < [email protected]> wrote: > > Why are my eyes watering? > > On 19/05/2017, at 5:03 AM, Bob Darlington wrote: > > > I had > > to soak my cavity ring in nitric acid for a month to get the tap out. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
