CIRCULAR RECEPTACLE 22-55 BULKHEAD; Product Range:PT Series; Circular Connector Shell Style:Thru Bulkhead Receptacle; No. of Contacts:55Contacts; Circular Contact Type:Solder Pin / Socket; Coupling Style:Bayonet; Insert Arrangement:22-55; Connector Body Material:Aluminium Alloy Body; Connector Body Plating:Olive Drab Chromate over Cadmium; Contact Material:Copper Alloy; Contact Plating:Gold; Insert Rotation:N; Service Class:General Duty; Equivalent Military Specification:MIL-DTL-26482 Series I