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 6610-01-147-9072
NSN 5998-01-512-5622
NSN 5990-00-764-7487
NSN 6610-00-284-3093
NSN 6320-01-089-9086
NSN 5999-01-547-6085
NSN 5905-00-563-1598
NSN 5835-01-411-7050
NSN 6135-01-017-3001
NSN 6685-00-881-7305
NSN 5999-01-127-1999
NSN 6110-00-463-0857