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 6105-00-480-2728
NSN 6240-01-572-0194
NSN 6645-00-664-4665
NSN 5975-01-421-2230
NSN 6220-01-390-4090
NSN 5895-01-171-4583
NSN 6650-01-067-0132
NSN 5965-01-247-3676
NSN 7035-01-077-4155
NSN 5895-01-058-4585
NSN 6130-01-465-8645
NSN 5975-00-780-5123