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 6220-00-617-1843
NSN 6145-01-003-4305
NSN 6645-01-168-8465
NSN 5835-01-170-5537
NSN 5945-00-926-8520
NSN 6320-01-652-3806
NSN 6645-00-664-4665
NSN 5945-01-322-0774
NSN 5996-00-192-2437
NSN 6220-01-544-2539
NSN 5920-01-122-6303
NSN 5925-00-905-5135