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 5999-01-352-5698
NSN 6110-01-026-1983
NSN 6105-01-634-0322
NSN 6240-01-522-3320
NSN 5905-01-521-6066
NSN 5998-01-132-6467
NSN 4140-01-227-1342
NSN 4140-00-832-3286
NSN 5910-01-411-0241
NSN 6685-00-896-6847
NSN 5975-01-338-7502
NSN 6145-01-634-0388