A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5999-00-639-3447
NSN 5910-00-228-3027
NSN 5925-01-020-7706
NSN 5905-01-469-2231
NSN 5999-01-422-0938
NSN 6620-00-992-5876
NSN 5996-00-397-4318
NSN 2925-00-891-9289
NSN 5935-01-577-0030
NSN 5925-00-054-4152
NSN 5905-00-514-1984
NSN 6320-00-456-2092