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 5990-01-079-8643
NSN 5945-00-073-2311
NSN 6220-00-089-8252
NSN 5910-00-202-1056
NSN 5895-00-887-0665
NSN 5950-00-440-8903
NSN 4140-01-634-0330
NSN 5999-00-618-1040
NSN 5925-00-695-9414
NSN 5925-01-261-4215
NSN 5915-00-079-1011
NSN 6110-01-357-3641