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 5920-01-628-2213
NSN 7035-00-981-7216
NSN 6145-01-591-7130
NSN 6650-01-467-8818
NSN 5925-00-044-5793
NSN 6650-01-267-6522
NSN 5998-01-210-9203
NSN 5920-00-043-2641
NSN 5975-01-349-3823
NSN 5945-01-196-9392
NSN 6110-01-333-1741
NSN 6645-01-136-4447