What This Jackscrew Does in the Assembly
The TE Connectivity 5229911-1 is a captive jackscrew from the CHAMP.085 series, designed as the mechanical locking hardware for standard D-Sub connectors. It provides the threaded engagement that pulls the connector pair together and holds them mated under vibration, while the slotted drive allows field adjustment with a standard screwdriver.
Thread Size and Length — What Fits Your Panel
The #4-40 thread size is the standard UNC thread for D-Sub hardware, compatible with the mating threaded inserts on standard D-Sub backshells and panel-mount receptacles. The 0.500" (12.70 mm) length below the head provides clearance for panels up to about 0.250" thick, while the 0.250" (6.35 mm) threaded portion below the head ensures enough thread engagement for a secure mate without bottoming out.