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 6220-00-296-4101
NSN 6110-01-633-9660
NSN 5985-01-049-1401
NSN 6620-01-422-3522
NSN 6105-01-258-7294
NSN 5975-01-586-4859
NSN 6110-00-902-3727
NSN 5895-00-401-4917
NSN 5905-01-442-8326
NSN 6685-01-407-2830
NSN 6320-01-481-7322
NSN 6685-00-816-8838