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 5945-00-358-7652
NSN 5950-00-953-4380
NSN 6145-00-313-9429
NSN 6650-01-484-3013
NSN 6320-00-036-3688
NSN 5925-00-221-8639
NSN 5910-01-035-7437
NSN 5935-01-170-0545
NSN 5910-00-391-2295
NSN 2925-01-121-3355
NSN 4140-01-333-6052
NSN 6320-01-362-9518