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 6220-01-121-7391
NSN 6685-01-562-7275
NSN 5999-01-262-9162
NSN 5910-00-901-4584
NSN 6105-01-406-2828
NSN 5905-01-481-6431
NSN 5950-01-452-5650
NSN 6320-00-682-3448
NSN 6650-00-458-7586
NSN 6110-00-359-0356
NSN 6685-00-455-3729
NSN 5930-01-134-4214