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 6650-01-154-8924
NSN 6130-01-152-2859
NSN 5999-00-564-4923
NSN 6220-00-917-0881
NSN 6220-01-449-1239
NSN 2925-01-149-0353
NSN 5915-01-264-7511
NSN 6320-00-809-5744
NSN 6240-01-609-7740
NSN 5905-00-231-5243
NSN 5910-00-292-0048
NSN 5920-00-929-8095