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 5905-00-163-9582
NSN 5895-00-753-5349
NSN 6645-01-573-7603
NSN 6620-00-378-3070
NSN 5895-01-422-2537
NSN 6110-00-350-6192
NSN 6645-01-421-3629
NSN 6650-00-423-2178
NSN 6610-00-063-8489
NSN 5999-01-469-0459
NSN 5855-00-763-2155
NSN 6150-00-665-3959