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 5960-01-308-6421
NSN 5950-01-066-0929
NSN 6645-00-503-1379
NSN 6645-00-960-6594
NSN 5999-01-247-1058
NSN 5855-00-058-1293
NSN 6610-01-450-3998
NSN 7035-00-470-4977
NSN 2925-00-246-3077
NSN 5965-01-207-0991
NSN 4140-01-067-8986
NSN 6220-01-199-9080