Panel-Mount Circular Receptacle for Harness Applications
It accepts a cable up to 0.941" (23.90 mm) in diameter through the rear entry, with solder cup termination on each of the 16 female sockets.
Last-Buy Status and Sourcing
The JR21RK-16S carries a Last Buy lifecycle status, meaning it is in its final procurement window before discontinuation. For BOM planning, secure quantities for the remaining production run or evaluate alternative circular connectors with matching shell size and circuit count.
Termination is by solder cup — each of the 16 female contacts is hand-soldered to the wire, requiring no crimp tooling. The keyed orientation ensures correct alignment with the mating plug, and the threaded coupling ring locks the pair together. The shell is unshielded beyond the metal housing itself, so for applications requiring EMI protection, a shielded cable or external braid termination at the gland is recommended.
Silver plating on the mating contacts provides adequate conductivity for moderate cycle life in indoor, controlled environments; for higher mating-cycle duty or corrosive atmospheres, gold-plated contacts would be preferred, but this variant does not carry them. The 0.941" (23.90 mm) cable opening determines the maximum jacket diameter that passes through the rear gland — confirm your cable O-ring or strain-relief fit before specifying.