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 5945-00-149-0619
NSN 5910-00-444-7746
NSN 5999-01-121-1194
NSN 6130-01-262-7092
NSN 5999-00-987-5455
NSN 5990-00-153-0055
NSN 6220-01-043-6500
NSN 5855-01-306-5655
NSN 5998-01-433-9758
NSN 5985-01-351-4436
NSN 6650-01-629-3832
NSN 5930-01-644-0199