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 4140-01-299-6713
NSN 5998-01-117-5901
NSN 6685-01-088-9388
NSN 6620-01-488-4681
NSN 6105-00-884-6792
NSN 5960-01-042-5831
NSN 5975-01-564-5357
NSN 5960-01-005-9530
NSN 5835-00-707-6266
NSN 6320-01-631-7828
NSN 7035-01-552-3696
NSN 5975-01-352-5853