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 2925-00-625-7566
NSN 6620-01-629-4045
NSN 5835-00-058-7017
NSN 5965-00-985-9157
NSN 5996-01-251-4900
NSN 5960-01-282-2386
NSN 2925-00-254-9776
NSN 6240-01-630-3442
NSN 6145-01-075-6250
NSN 6650-00-035-9297
NSN 5990-01-544-0364
NSN 6320-00-681-1324