What This Screw Lock Fits and Why It Matters
The TE Connectivity 5745563-3 is a jackscrew socket for the AMPLIMITE HDE-20 series of D-subminiature connectors. It carries a 4-40 thread on both the socket and screw ends, matching the standard UNC 4-40 jack-screw pattern used across the D-sub family. The threaded portion below the head measures 0.250" (6.35 mm), which is the length that passes through the connector shell and panel — enough for a standard D-sub mounting flange plus a thin panel, but not so long that it bottoms out in a shallow cavity. This is a hardware accessory, not a connector body; it secures the male and female D-sub halves together and provides the mechanical retention that keeps the contact interface mated under cable strain or vibration.
Thread Size and Compatibility Check
That means this jackscrew socket will physically fit any D-sub that uses 4-40 hardware, but the manufacturer explicitly lists it for AMPLIMITE HDE-20 connectors. The HDE-20 series uses a specific shell size and thread hole location; if you are retrofitting a non-AMPLIMITE D-sub, the thread will engage, but the screw length and socket profile are tuned for the HDE-20 shell. The 0.250" threaded portion is the standard length for a D-sub jackscrew — it clears the shell thickness and a typical 0.062" PCB or 0.050" panel without protruding past the nut.