DS EN 4531-101:2012 Aerospace Series - Connectors, Optical, Circular, Single And Multipin, Coupled By Triple Start Threaded Ring - Flush Contacts - Part 101: Optical Contact For En 4641-100 Cable -55 Degrees C To 125 Degrees C - Product Standard Specifies the performance and dimensions of optical PC profiled contact for 62,5 [mu]m/125 [mu]m fibre and (1,8 +/- 0,1) mm diameter cable for EN 4641-100.