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 5950-01-660-1870
NSN 5950-00-007-1952
NSN 5999-00-056-0881
NSN 6105-00-202-2469
NSN 6105-00-998-8227
NSN 6685-01-048-6411
NSN 5925-01-611-3434
NSN 5990-00-935-5610
NSN 4140-00-274-9638
NSN 4140-01-267-5137
NSN 5835-00-350-3703
NSN 5990-00-311-1031