DS EN 3733-103:2008 Aerospace Series - Connector, Optical, Circular, Single Channel, Coupled By Self-Locking Ring, Operating Temperature Up To 150 Degrees C Continuous - Part 103: Protective Cover Jam Nut Receptacle - Product Standard Defines the characteristics of protective covers for single channel fibre optic jam nut receptacle connectors, operating temperature up to 150 degrees C.