The 4640-6001 is a 40-way 0.100 x 0.100-inch Wire to Board Connector for 0.050-inch pitch cable, with gold-plated copper alloy contacts and IDC/IDT termination. This 4600 series wiremount plug/connector is glass filled polyester (PBT) insulated, shrouded to protect against physical and chemical pin damage. This wire to board connector has open end cover, military (with 3518 polarizing key) and centerbump polarization for 40-contacts without mounting flange.