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 5835-00-348-2013
NSN 4140-01-149-0926
NSN 7035-01-506-6705
NSN 6645-00-664-4665
NSN 7035-00-001-4586
NSN 6110-01-081-2898
NSN 5920-01-147-5652
NSN 5945-01-088-8071
NSN 5950-01-045-7442
NSN 6130-01-274-9444
NSN 6320-00-466-0371
NSN 5910-00-924-5693