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 6145-00-838-1811
NSN 5950-00-401-0183
NSN 5910-01-464-3734
NSN 5935-00-399-3420
NSN 6150-01-141-6604
NSN 5945-01-069-6167
NSN 6320-01-519-8767
NSN 6110-01-279-7621
NSN 6145-00-905-5162
NSN 5930-01-222-1251
NSN 6145-01-634-0388
NSN 5945-00-843-4482