The 031-71011-RFX: This is a panel-mount bulkhead jack with a bayonet lock, accepting a female socket contact.
This jack is designed for a specific cable group: RG-59, RG-62, RG-140, RG-210, and Belden 8241, 8263, 8279, 9209. These are all 75 Ohm cables, so the impedance match holds through the crimp junction.
The bayonet lock provides quick mate-and-release, with positive retention against vibration up to the 500-cycle mating life.
