AMPLIMITE HD-20 Series, Front Metal Shell, PCB Mount d-Sub Connectors with ACTION PIN Contacts AMPLIMITE HD-20 Series PCB mount d-sub plug and receptacle connectors with a tin plated steel front metal shell and duplex plated ACTION PIN contacts and are suitable for mounting on a PCB with a 2.36mm thickness. These AMPLIMITE HD-20 PCB d-sub connectors are available with a variety of mating hardware options including fixe female 4-40 screwlocks, 4-40 threaded inserts and 3.05mm mounting holes (Please see table for details)