240-position DDR2 DIMM with board lock and latches
The 10005639-11129LF: Gold-plated contacts with 3.00µin (0.076µm) thickness resist corrosion across repeated memory module insertions; integrated board locks and latches secure the module against vibration during transport or field service.
What the board lock and latch mean on site
The board lock holds the connector body to the PCB during wave solder, preventing float that misaligns the contact tails — a common failure point when re-pinning a DIMM socket on a production line. The latches snap over the module edge and hold it seated; a loose latch produces intermittent memory errors that look like a bad DIMM, not a bad socket.