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 6320-00-894-1644
NSN 6620-00-955-6122
NSN 6320-00-483-0451
NSN 5935-01-180-6668
NSN 6620-01-481-1358
NSN 5855-00-138-2386
NSN 5985-00-723-6740
NSN 5855-01-100-3272
NSN 5996-00-853-3879
NSN 4140-01-063-0551
NSN 5920-01-025-6989
NSN 5910-01-596-6960