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 5998-01-607-3685
NSN 6110-01-168-8600
NSN 4140-00-411-6848
NSN 5975-00-135-6607
NSN 6145-00-505-7555
NSN 5835-01-317-4840
NSN 6105-01-142-2376
NSN 2925-01-298-2674
NSN 5998-00-577-0003
NSN 6105-01-119-3514
NSN 5925-01-090-5283
NSN 5930-01-490-3613