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 5910-01-010-2911
NSN 4140-01-096-1596
NSN 6150-01-514-7196
NSN 6620-01-201-3269
NSN 6130-01-280-5113
NSN 6220-00-587-3431
NSN 6105-01-198-5875
NSN 6110-01-461-9617
NSN 5985-01-626-0625
NSN 6610-01-463-5368
NSN 6645-01-274-0731
NSN 6685-01-344-6639