2012BS EN 4531-003:2012 Aerospace series. Connectors, optical, circular, single andmultipin, coupled by triple start threaded ring. Flushcontacts. Square flange receptacle. Product standard
2008BS EN 4531-003:2007 Aerospace series - Connectors, optical, circular, single and multipin, coupled by threaded ring - Flush contacts - Part 003: Square flange receptacle — Product standard