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 5905-01-076-5309
NSN 6645-01-459-7788
NSN 4140-01-269-0383
NSN 5910-01-293-7491
NSN 6620-00-253-6329
NSN 5990-01-386-3040
NSN 5996-00-700-1182
NSN 5975-01-144-2246
NSN 5910-01-097-3837
NSN 6650-01-450-7930
NSN 5855-00-256-5562
NSN 5915-01-358-2467