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 6240-01-534-4007
NSN 5965-01-147-5847
NSN 5910-00-962-0531
NSN 6645-01-367-2581
NSN 5990-00-968-1253
NSN 5895-01-106-2916
NSN 5975-00-103-2814
NSN 5920-00-594-3124
NSN 5996-01-197-7005
NSN 6105-01-444-0795
NSN 5935-01-388-2066
NSN 6145-01-141-0214