The Amphenol FCI D15S24A4PA00LF is a 15-position D-Sub receptacle from the Delta D series, the standard-density DA shell size (2 rows). The unthreaded flange means this shell won't take jackscrews — it's a panel-mount with housing/shell retention, not a screw-lock joint.
Flange Feature: Threaded vs Unthreaded — What Changes
The D15S24A4PA00LF carries an unthreaded housing/shell flange. That means no jackscrews — the mating plug is held by the shell's friction and the board's solder joints, not a threaded lock. If your application is subject to vibration or needs a positive mechanical lock, the D15S24B4GV00LF carries a mating-side female screwlock (4-40), and the D15S24B4GX00LF adds board locks for extra shear retention on the PCB. The unthreaded flange is simpler and lower-profile, but it trades away the vibration-proof mate.