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 5920-00-938-5399
NSN 5920-00-924-7348
NSN 6220-00-111-4051
NSN 5960-01-011-6358
NSN 5915-01-240-8398
NSN 5950-01-193-1009
NSN 4140-01-005-0154
NSN 5998-01-359-6291
NSN 5855-01-278-4868
NSN 6130-01-170-5660
NSN 6620-01-422-7012
NSN 5920-01-415-6546