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 5950-01-315-6554
NSN 6150-00-105-2800
NSN 5998-01-347-4256
NSN 6650-01-520-6130
NSN 5930-01-020-6724
NSN 7035-00-008-1809
NSN 5920-01-341-2094
NSN 6610-01-604-7335
NSN 6135-00-452-2266
NSN 5965-01-240-0233
NSN 5965-01-633-8849
NSN 5915-00-679-9390