The rocketry components that you find here are a culmination of years of my experience as an electronics engineer being involved in high power rocketry. The components that I have developed are used in the design and fabrication of rockets with emphasis on deployment and tracker electronic bays. The electronic bay components allow for the re-use of bays between rockets and also to allow bays to be reconfigured as technology changes without having to rebuild completely. At this time, I am releasing a variety of parts for the use in general electronic bays and 54mm coupler tube electronic bays. There are also a few general purpose "assistants" to make building easier.
This ring provides three 4-40 threaded inserts for mounting caps and bulkheads which can be for deployment or such things as antenna connections and there are three 6-32 machine screw nuts at 120 degree intervals for mechanically securing the ring inside of a coupler tube if needed.
The 54mm CT Float bulkhead is a do it yourself part. It has SMT Designs' standard ring pattern on one side (hole depth is 5mm) so it can be attached to any of the other SMT Designs parts that have the same pattern.