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 5920-00-269-4060
NSN 5996-00-410-8554
NSN 6110-00-234-9377
NSN 5985-01-462-1670
NSN 5998-01-548-2157
NSN 5855-01-430-0132
NSN 5965-01-415-0872
NSN 5960-01-649-1341
NSN 7035-01-406-5232
NSN 5998-01-104-9157
NSN 6105-01-075-5562
NSN 5910-01-464-7859