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 6110-00-242-4065
NSN 6150-01-289-5268
NSN 6150-01-013-2030
NSN 6135-00-128-1633
NSN 5920-00-824-4131
NSN 6685-00-419-5887
NSN 5905-01-408-5804
NSN 5835-01-058-1063
NSN 5925-01-613-9807
NSN 6220-00-981-9184
NSN 7035-01-621-1791
NSN 5895-01-495-7244