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 6135-01-344-2442
NSN 6220-01-600-9572
NSN 5996-00-386-2236
NSN 5920-01-102-7354
NSN 2925-01-254-3068
NSN 5999-01-006-4616
NSN 5920-00-279-6584
NSN 4140-01-352-2924
NSN 5945-01-290-8732
NSN 5855-01-222-1242
NSN 5930-01-415-3111
NSN 5960-01-291-0479