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 5915-01-525-9893
NSN 5920-00-382-8849
NSN 5960-01-328-8248
NSN 5895-01-037-7112
NSN 6110-00-087-6927
NSN 6650-00-398-1821
NSN 6145-01-394-3122
NSN 6620-01-371-5040
NSN 6150-00-286-0827
NSN 5915-01-442-8785
NSN 5930-01-407-5558
NSN 6320-01-495-4170