What This Cover Fits and Why You Need It
The Hirose HR10A-13R-C is a protective cap (cover) for the HR10A series circular connectors, shell size 13. It's designed to cover the mating face of a 20-position receptacle when the plug is disconnected — keeps dust, debris, and incidental contact off the contacts. If you're maintaining a harness with a Hirose HR10A receptacle that's periodically unmated, this cap is the field-fit solution to protect the open connector half.
Shell Size and Color — What to Match
Shell size 13 is the physical envelope — it matches the HR10A receptacle of the same shell size. The cap is black, molded in the same material as the connector body. No strap or ring is included on this version, so it's a bare cap — you'll need to secure it with your own lanyard or tether if the application calls for it.