JAND38999/33Z17R is a QPL-approved receptacle dust cover designed to protect unmated MIL-DTL-38999 Series III connectors. This dust cap features a Black Zinc Nickel (Z) finish over aluminum alloy construction with shell size 17, and includes a stainless steel rope lanyard (style R). The finish provides 500 hours of salt spray resistance with conductive electrical properties and operates over a temperature range of -65°C to +175°C, meeting ASTM B841 Type D specifications. It offers environmental protection and keeps impurities out of the termination area when connectors are not in use, making it ideal for harsh and demanding aerospace and military applications.