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 5945-00-733-5275
NSN 6150-01-199-9087
NSN 6650-01-342-8453
NSN 6240-01-182-8217
NSN 5945-01-280-2884
NSN 6105-00-763-7967
NSN 6685-01-464-1304
NSN 5960-01-355-2968
NSN 5945-01-592-2115
NSN 5895-01-441-7287
NSN 5835-01-370-4292
NSN 5975-01-012-2591