DEUTSCH DTS26W13-4PB Circular Connector, DTS Series, MIL-DTL-38999 Series III Equivalent, Straight Plug, 4 Contacts

DEUTSCH DJT10F25-4PB-LC Circular Connector, DJT Series, MIL-DTL-38999 Series I Equivalent, Wall Mount Receptacle
Conn Circular PIN 56 POS Crimp ST Wall Mount 56 Terminal 1 Port