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 5910-01-322-5964
NSN 6110-00-997-6581
NSN 5998-01-634-0604
NSN 5945-01-573-1555
NSN 5960-01-406-4136
NSN 5915-00-914-0063
NSN 6685-01-530-0154
NSN 6130-01-507-0302
NSN 6145-01-026-3827
NSN 7035-01-344-8708
NSN 6685-00-905-7616
NSN 6150-01-155-8081