CIRCULAR, SIZE 21, 39WAY, PIN; Product Range:DTS Series; Circular Connector Shell Style:Jam Nut Receptacle; No. of Contacts:39Contacts; Circular Contact Type:Crimp Pin; Coupling Style:Threaded; Insert Arrangement:21-39; Connector Body Material:Aluminium Alloy Body; Connector Body Plating:Electroless Nickel; Contact Material:Copper Alloy; Contact Plating:Gold; Insert Rotation:N; Service Class:EMI; Equivalent Military Specification:MIL-DTL-38999 Series III; SVHC:Cadmium (27-Jun-2018); Approval Category:MIL-C-38999 Series III