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 5999-01-230-8260
NSN 5998-01-454-9751
NSN 5950-01-054-3508
NSN 5925-00-500-9664
NSN 6645-01-112-6373
NSN 5996-01-145-6557
NSN 5990-01-215-0590
NSN 5998-00-712-8963
NSN 5925-01-197-9899
NSN 6620-01-357-0757
NSN 5935-01-262-7637
NSN 5960-01-617-6345