The TE Connectivity 223969-4 is a steel guide pin from the UPM (Universal Power Modules) series, threaded 8-32. It is an alignment accessory for modular power connector systems — not a power or signal contact. The steel material gives it the thread strength and wear resistance needed for repeated blind-mate alignment in backplane or cabinet-level power distribution assemblies.
The 8-32 thread is the standard UNC machine-screw size for panel-mount guide pins in this class. It mates with a tapped hole or a threaded insert in the mating panel or backplane, providing a positive stop for the connector pair during engagement. Steel construction means the threads resist galling over multiple mate/unmate cycles — important for a guide pin that sees field service or rack-level assembly.