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 5950-01-204-0248
NSN 6135-01-142-2417
NSN 4140-00-104-7323
NSN 4140-01-155-9414
NSN 6130-01-569-6762
NSN 5925-01-196-9282
NSN 5925-00-055-6046
NSN 6650-01-572-8505
NSN 5990-01-465-3088
NSN 5905-00-169-4414
NSN 5950-01-025-4345
NSN 5975-01-198-9013