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 5945-01-430-2222
NSN 5855-01-392-1110
NSN 6110-00-807-2501
NSN 5975-00-852-9046
NSN 7035-01-359-7460
NSN 6145-00-180-5805
NSN 5965-01-399-8454
NSN 6240-01-116-3382
NSN 5920-01-020-7659
NSN 6110-00-383-5367
NSN 4140-01-508-5454
NSN 5985-00-170-6768