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 6320-00-466-0371
NSN 5930-00-612-8487
NSN 6620-01-308-0860
NSN 5998-00-131-2760
NSN 6645-01-426-0207
NSN 5998-01-158-5707
NSN 6110-00-205-1778
NSN 6145-01-131-6891
NSN 5915-01-615-2943
NSN 5975-01-471-3828
NSN 6240-01-381-1072
NSN 5935-01-227-5652