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 5920-00-840-3570
NSN 6610-01-214-6680
NSN 6150-01-299-5227
NSN 5985-00-755-2984
NSN 6130-01-396-0874
NSN 5835-00-936-8753
NSN 5950-01-476-1444
NSN 6620-01-197-8207
NSN 5920-00-788-2322
NSN 2925-00-221-4977
NSN 6150-01-437-2992
NSN 6105-01-329-3533