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 5998-00-934-1391
NSN 7035-00-541-8516
NSN 5996-00-312-7349
NSN 5990-00-506-8315
NSN 6110-01-302-4302
NSN 5990-00-288-1820
NSN 5975-01-381-2763
NSN 5950-01-210-6408
NSN 5998-01-160-5135
NSN 6620-01-548-9993
NSN 6130-01-075-5653
NSN 6150-01-426-0201