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 6320-01-506-9439
NSN 5996-00-925-0173
NSN 5915-01-578-6153
NSN 6150-00-562-3507
NSN 5950-00-575-6922
NSN 5990-01-121-1175
NSN 5960-01-102-2438
NSN 6150-01-539-4125
NSN 5895-01-191-5740
NSN 6145-00-188-3657
NSN 5975-00-015-7919
NSN 6110-01-237-2548