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 6105-01-153-2302
NSN 6650-01-555-8349
NSN 5855-01-335-8907
NSN 4140-00-707-5963
NSN 5945-01-558-8487
NSN 6145-00-074-2736
NSN 2925-01-624-5647
NSN 6650-01-325-7926
NSN 6320-01-648-5538
NSN 6240-00-269-9727
NSN 6240-01-455-7903
NSN 6110-01-069-2966