so i wanted to take my lampwork in another direction and try and make a bunch of cabinet knob designs. my thought process on this is to make the knobs like a pendant w/ a marble mold and no loop obviously. Then I was going to make the sleeve part by coiling color over the front tip of a fat mandrel w/ bead release on it leaving the front part slightly solid and then coil the color about and inch and a half or so down the mandrel. I would marver this round and smooth and weld on the knob part then anneal. after cooling in the kiln I would remove the knob and sleeve from the mandrel and gringd the other end of the sleeve (that would join against the wood of the cabinet) flat and flush. now there should be a hole where the mandrel was, I need to find some sort of small diameter tubing (brass, steel, whatever) that is threaded on the inside that I can cut and epoxy into the sleeve to accept the machine screw from the other side (thus securing the decorative knob on the cabinet door). I went to home depot w/ no success and figured maybe someone here might no where to find this stuff. Next week I'm going to visit a machine/engineering shop to see if they might know where to get this female threaded tubing. Also, what should I use for 1/4 mandrels? any help/ advise would be great. thanks