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 4140-01-528-5715
NSN 5895-01-504-6871
NSN 5920-01-016-2655
NSN 5999-01-315-0524
NSN 7035-01-536-0438
NSN 6220-01-534-3965
NSN 6110-01-461-7452
NSN 6145-01-123-2138
NSN 5895-01-578-6285
NSN 6135-00-078-9931
NSN 6150-00-188-2958
NSN 5920-01-359-3982