[ARC5] Bristol 6 flute set screws for knobs

sbjohnston at aol.com sbjohnston at aol.com
Thu Jun 26 17:12:27 EDT 2025


I sometimes see set screws called by the name "grub screw".  That might help in your searching.

The knob I see in the photo is a cast metal knob from an R-390.  
I believe DakaWare does make shiny plastic knobs in that shape with a metal insert.  I also recently bought some of that same shape in various sizes from one of the small parts vendors in Akihabara, Japan.  They were made by a Japanese company (don't remember the name right now) and had flat screwdriver set screws.
I've only ever seen DakaWare knobs with flat and hex screwdriver set screws.  If you rounded the edges on one and sprayed it with a flat or satin finish coating it might approximate the look of the original R-390 knob (if you can't find a suitable set screw for the original knob).  It wouldn't have the "heft" of the original, though.  

Steve WD8DAS   

sbjohnston at aol.com   
http://www.wd8das.net/   http://af4k-crystals.com/   
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