Triad 20 4-way panel mount receptacle by TE connectivity by Thoms& Betts. For data, signal, control and power applications. formery available through RS, now hard to find. Thomas & Betts part: M1131-P04 RS. legacy stock No : 484-284 Tyco part : M1131-P04 ( PN 1-1437726-2) RoHS compliant :YES Circa: 2003