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 5905-01-467-9025
NSN 6130-01-542-9491
NSN 6240-01-428-8941
NSN 6105-01-264-2630
NSN 5985-01-641-0275
NSN 6130-00-583-9925
NSN 5895-00-469-9767
NSN 6645-00-673-0337
NSN 5998-01-391-0575
NSN 5920-01-028-5727
NSN 5999-01-448-9520
NSN 5895-00-910-0908