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 5920-00-113-5215
NSN 5920-00-773-1282
NSN 7035-00-238-3662
NSN 5935-01-538-6702
NSN 6320-00-994-0179
NSN 6150-01-157-2931
NSN 6685-00-425-2373
NSN 2925-01-239-6044
NSN 6110-01-443-3247
NSN 5998-01-056-9871
NSN 6130-01-524-1988
NSN 5999-00-865-8731