DS EN 3682-008:2013 Aerospace Series - Connectors, Plug And Receptacle, Electrical, Rectangular, Interchangeable Insert Type, Rack To Panel, Operating Temperature 150 Degrees C Continuous - Part 008: Size 4 Receptacle - Product Standard Specifies the size 4 receptacle used in the family of rectangular electrical connectors for rack to panel, with interchangeable inserts.