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 6150-00-338-3674
NSN 5985-01-607-0291
NSN 5990-00-756-6059
NSN 5950-01-154-6388
NSN 5910-01-093-5143
NSN 5905-01-411-0345
NSN 5985-01-634-0635
NSN 6145-01-312-2265
NSN 6145-01-111-3626
NSN 5905-01-144-3879
NSN 6650-01-145-5173
NSN 6650-00-647-1085