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 6105-00-332-1173
NSN 5960-00-188-8648
NSN 5990-01-432-4984
NSN 5960-01-526-3843
NSN 5910-01-378-3172
NSN 5960-01-089-7174
NSN 6645-00-884-5845
NSN 5920-01-652-1179
NSN 7035-01-534-4459
NSN 5835-01-561-2959
NSN 5990-01-625-0855
NSN 5985-01-151-1398