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 5925-01-386-6188
NSN 6620-01-162-0220
NSN 5990-01-136-4068
NSN 6105-01-585-2502
NSN 5960-01-327-5922
NSN 6650-01-228-5094
NSN 4140-01-542-9504
NSN 5998-00-528-9032
NSN 6135-01-567-0739
NSN 6645-00-445-8143
NSN 4140-01-333-2504
NSN 6650-00-918-4156