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 5999-00-529-0157
NSN 6135-01-616-4950
NSN 5945-01-127-7261
NSN 6650-01-082-5534
NSN 2925-01-434-6945
NSN 6105-00-183-9019
NSN 2925-01-172-0176
NSN 5950-01-650-9737
NSN 4140-01-194-8291
NSN 5990-01-117-6633
NSN 5996-01-399-6677
NSN 6645-01-413-0515