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 6620-00-140-8644
NSN 5975-01-057-4371
NSN 5996-01-385-6659
NSN 5998-01-473-8386
NSN 5998-01-106-3813
NSN 6220-00-508-9155
NSN 5950-01-298-9341
NSN 2925-00-254-9776
NSN 6130-01-303-6776
NSN 5920-00-573-7512
NSN 6150-00-886-6638
NSN 5975-00-269-8391