If you're planning an installation in a dusty or moist environment, there are special considerations to ensure your gear doesn't get damaged by the elements.
Rated to IP65, the SCCD-W self-closing cap for all D-size panel mount connectors is a great way to ensure moisture and dust don't get into your signal path while a connection is not in use.
The spring-loaded cover shuts automatically after unplugging the cable connector and seals the chassis connectors against dust and water. The transparent cover allows you to see the protected chassis connector all the time.
XLR D Series female; XLR D Series male; 1/4" Jacks D Series; speakON NL2MP and NL4MP; powerCON 20 A Series NAC3MPA and NAC3MPB; powerCON TRUE1 NAC3MPX; opticalCON Chassis Connectors; USB NAUSB-W; HDMI NAHDMI-W; D-SUB NADB; Firewire NA1394-6-W; etherCON D Series; etherCON CAT6 Chassis Connectors; BNC D Series; Phono (RCA) Chassis Connectors
If you don't need IP65 rating, try these options:
Protect the rear of your D-size panel mount with SCDR soft plastic cover