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 6610-00-186-9180
NSN 5965-01-313-9762
NSN 5835-00-148-9719
NSN 4140-01-460-4975
NSN 6110-00-296-0500
NSN 5915-01-380-7623
NSN 6645-01-406-0428
NSN 5925-00-869-1630
NSN 5920-01-298-0316
NSN 6150-01-094-7298
NSN 5835-01-214-5402
NSN 5855-01-088-8700