Through-hole RCA jack, 3.20 mm ID / 9.00 mm OD
The 584 is Keystone Electronics' mono phono (RCA) jack, a 2-conductor female receptacle accepting the standard 3.20 mm inner diameter and 9.00 mm outer diameter plug. Through-hole mounting with kinked pins secures the brass body and tin-plated brass contacts; the white insulation and unshielded shell suit line-level audio signal paths.
Contact and termination detail
Tin-plated brass contacts on the 584 mate with the plug's centre pin and outer sleeve; the kinked pin termination provides retention in the PCB hole during wave soldering. No internal switch is present — the jack is a straight-through mono connection without muting or switching contacts.