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 5920-01-191-6321
NSN 6105-00-174-8245
NSN 5998-01-222-0641
NSN 6610-01-518-3923
NSN 4140-01-351-1014
NSN 6220-01-543-1409
NSN 6105-01-412-0811
NSN 6105-01-066-0330
NSN 7035-00-163-6221
NSN 6645-00-728-1316
NSN 5905-01-510-9222
NSN 5835-00-451-2982