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 5945-00-254-2322
NSN 5935-01-020-8274
NSN 5920-01-557-9604
NSN 7035-00-803-3056
NSN 6620-00-136-3468
NSN 5930-01-241-1857
NSN 5855-00-832-9341
NSN 5960-01-025-2526
NSN 5960-01-416-6187
NSN 5975-01-183-2076
NSN 6320-01-029-4220
NSN 5998-01-049-5426