B57 series .085" (2.16mm) pitch receptacle connector with 50 contacts. The contacts have gold flash (2µ" min.) plating and have right angle P.C.B tails, 2.54mm (.100") long. It is mounted with 4-40 UNC threaded inserts on the panel side and Ø3.05mm (Ø.120") through holes on the board side. The body has a metal shell with blue PBT insulator.