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 5996-01-348-7370
NSN 5965-01-645-5719
NSN 5905-00-066-4093
NSN 5915-00-902-2763
NSN 5910-01-031-5372
NSN 6130-00-149-1977
NSN 6110-00-193-2847
NSN 5975-01-443-3167
NSN 6620-01-031-3989
NSN 5945-01-627-9124
NSN 6320-01-440-4982
NSN 5835-01-140-6452