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 5835-01-629-2044
NSN 5905-00-578-2929
NSN 4140-00-531-6696
NSN 6130-01-016-2235
NSN 5895-00-172-3994
NSN 6145-01-048-2750
NSN 7035-01-298-5154
NSN 6110-01-387-5638
NSN 4140-01-119-9473
NSN 5945-00-499-7237
NSN 5998-01-498-3105
NSN 6105-01-410-8948