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 6130-01-118-4022
NSN 5975-01-438-1819
NSN 5905-00-007-2489
NSN 6240-00-319-4549
NSN 5915-01-353-7974
NSN 6685-01-242-1030
NSN 6220-01-526-4740
NSN 5965-00-232-7395
NSN 6135-00-958-7981
NSN 5960-00-811-1258
NSN 5905-01-060-4475
NSN 4140-01-435-6540