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 5895-00-518-1593
NSN 5855-01-630-5790
NSN 5975-00-549-4274
NSN 6150-00-408-4740
NSN 5925-00-433-6125
NSN 6145-01-015-8878
NSN 5945-00-449-0107
NSN 5985-01-065-1675
NSN 6320-01-347-2638
NSN 5895-01-121-8159
NSN 5945-00-877-6374
NSN 6150-00-530-3046