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 6150-01-464-4008
NSN 6610-01-300-8383
NSN 5915-01-490-3793
NSN 5965-01-142-7862
NSN 5965-00-033-5928
NSN 6610-01-434-2044
NSN 2925-00-329-2282
NSN 6320-01-506-9439
NSN 5835-00-315-3797
NSN 6150-01-263-2342
NSN 2925-00-391-0331
NSN 4140-00-538-8959