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 6320-01-532-7491
NSN 5975-01-401-5355
NSN 2925-01-068-3262
NSN 5930-01-400-6126
NSN 5935-01-085-4542
NSN 6105-00-053-4162
NSN 5855-01-512-1926
NSN 5925-01-537-0409
NSN 6645-01-088-5244
NSN 5950-00-813-5776
NSN 5965-00-431-2492
NSN 2925-00-149-0760