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 5945-00-657-7232
NSN 5998-01-515-4094
NSN 5910-01-399-4564
NSN 6610-00-394-1427
NSN 6150-00-405-0608
NSN 5895-00-932-1577
NSN 5975-00-103-2814
NSN 6610-00-934-1044
NSN 6320-01-072-2073
NSN 5915-01-519-3287
NSN 4140-01-264-0885
NSN 5910-01-573-2828