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 5999-01-020-5907
NSN 5945-01-551-3678
NSN 5965-01-467-5471
NSN 2925-00-323-7394
NSN 5895-01-401-5388
NSN 6145-01-478-8436
NSN 4140-01-305-2112
NSN 5895-01-437-6925
NSN 2925-01-375-9487
NSN 5985-00-058-3842
NSN 5855-01-042-7990
NSN 6650-01-433-5098