The 61304011021 is a 40-way 1-row black through-hole right angle Pin Header, stamped contacts, 2.54mm pitch. This WR-PHD series header with gold-plated copper alloy contacts, PBT insulator. It mates with 6100xx11921, 6100xx13321, 6130xx11821, 6130xx143121 and 6130xx15721.