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 6220-00-796-4977
NSN 6220-01-487-2229
NSN 6645-01-336-3647
NSN 5920-00-543-1266
NSN 6610-00-841-8221
NSN 6610-01-583-9635
NSN 6145-01-510-9570
NSN 5935-01-385-1126
NSN 6320-00-139-1090
NSN 5965-01-209-2838
NSN 5935-00-434-2930
NSN 6645-01-092-4733