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 6320-01-631-7828
NSN 6105-01-363-8998
NSN 5998-01-496-1437
NSN 4140-01-536-2501
NSN 5975-01-296-4666
NSN 6150-01-222-2806
NSN 5990-01-605-4769
NSN 2925-01-170-1089
NSN 5835-01-328-6626
NSN 6220-01-484-9583
NSN 5905-00-125-7047
NSN 5910-01-225-8041