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 6610-00-610-0228
NSN 6240-00-752-2581
NSN 5925-01-347-8185
NSN 6145-00-284-1514
NSN 4140-01-303-7601
NSN 5975-00-067-5236
NSN 5998-01-367-6718
NSN 7035-01-388-6943
NSN 5905-01-192-1845
NSN 6645-01-180-6219
NSN 5910-01-399-4564
NSN 5950-01-619-0543