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 4140-01-165-0566
NSN 2925-00-942-2417
NSN 5915-00-615-9537
NSN 6110-00-369-8499
NSN 6135-00-107-6662
NSN 5915-00-051-3997
NSN 5905-01-205-2044
NSN 5910-00-221-2328
NSN 5998-01-214-6810
NSN 5950-01-633-2949
NSN 6110-00-854-2249
NSN 6320-01-311-6576