54mm Experimental Bulkhead
Same as the 54mm Standard Bulkhead but comes with a 1/4" NPT flarred female fitting instead of the 1/4-20 SAE threads and brass thumb screw.
Smoke well is 1.25" deep by 1" wide.
Use McMaster Carr part # 48805K113 (or similar) to easily reduce from 1/4" to 1/8" NPT female fitting. We like to use these high pressure precision fittings since they offer a smooth flat surface to push against a load cell bolt.
You can still use them in flight with the simple use of a plugged fitting as well.