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 5835-01-104-1299
NSN 5990-01-110-8979
NSN 5960-01-076-4708
NSN 6110-01-593-2458
NSN 5960-01-181-2143
NSN 5960-01-437-7422
NSN 5998-00-725-2013
NSN 5960-01-151-4518
NSN 5905-01-118-8692
NSN 6145-01-519-7571
NSN 6685-01-036-7635
NSN 2925-01-350-8372