It's a crimp-termination pin — you strip the wire, crimp the contact, and insert it into the housing — so you can rebuild a DB9 or DB25 loom one contact at a time without desoldering a board. Give me a pinout and I'll rebuild it with these.
Wiring and Termination Notes
This pin accepts 22-26 AWG wire — the standard range for signal-level D-sub circuits. The brass body with gold plating keeps contact resistance low through the crimp barrel. No special tooling beyond a standard HDP-20 crimp frame; the stamped construction means the contact holds its shape through the crimp cycle without spring-back.