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 6320-00-164-4087
NSN 5960-00-632-3217
NSN 5925-01-495-1071
NSN 5835-01-482-1591
NSN 6110-01-167-7939
NSN 5998-01-278-9713
NSN 5925-00-337-8138
NSN 6320-01-607-0347
NSN 6145-00-759-6745
NSN 6105-01-161-1657
NSN 6645-01-121-6952
NSN 6110-01-513-5417