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 5925-01-144-1231
NSN 5945-01-426-8747
NSN 5835-01-328-6626
NSN 6650-01-408-5089
NSN 5965-01-062-3492
NSN 6110-01-630-8633
NSN 6130-01-377-5922
NSN 6685-00-405-4991
NSN 5835-01-647-0775
NSN 6150-00-951-3420
NSN 6145-01-465-3733
NSN 5915-01-121-2565