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 5998-01-630-4881
NSN 5935-01-341-3782
NSN 2925-01-510-9378
NSN 6320-01-006-6138
NSN 5895-01-376-7655
NSN 5925-00-925-2164
NSN 5965-00-324-2428
NSN 5999-01-470-9703
NSN 5996-01-364-1074
NSN 5998-00-248-8587
NSN 5835-00-253-3453
NSN 6645-00-229-1521