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 6645-01-072-7889
NSN 5930-01-517-6976
NSN 6150-01-160-1790
NSN 7035-01-659-4755
NSN 6650-01-570-5388
NSN 5925-01-519-3664
NSN 5930-00-900-5758
NSN 5996-00-928-3182
NSN 6240-01-408-9377
NSN 6105-00-519-2983
NSN 5998-00-156-4574
NSN 6130-01-573-4390