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 5855-00-149-0766
NSN 6685-00-719-8313
NSN 5920-01-273-0994
NSN 5905-01-388-2670
NSN 6150-01-527-0217
NSN 6220-01-469-6213
NSN 7035-01-513-9502
NSN 5999-01-007-8208
NSN 6150-01-411-6299
NSN 5990-00-061-9041
NSN 6130-00-323-8300
NSN 5920-01-297-5895