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 5990-01-499-6930
NSN 5905-00-058-4144
NSN 4140-00-107-8212
NSN 5985-00-336-5813
NSN 6110-01-255-6523
NSN 6150-00-259-4632
NSN 6135-01-512-8740
NSN 5975-01-522-9386
NSN 5905-01-295-6892
NSN 6650-01-261-0389
NSN 6130-01-467-2722
NSN 5965-00-185-9687