TE Connectivity Metrimate 5mm Square Grid Pin and Socket PCB Headers Metrimate square grid pin and socket PCB mount headers with red thermoplastic, 94V-0 rated housings and a 5mm centerline. These square grid pin and socket PCB mount headers are preloaded with copper alloy,plated tin or gold duplex pin contacts or phosphor bronze, plated tin or gold duplex socket contacts and have locking tabs and mounting ears.