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 6645-01-154-3080
NSN 5985-01-495-9662
NSN 5910-00-463-6939
NSN 5905-01-576-9362
NSN 5920-00-811-2667
NSN 5945-00-046-4593
NSN 5920-01-017-4980
NSN 2925-01-347-4208
NSN 5935-01-357-6250
NSN 5965-01-286-6548
NSN 2925-00-150-7334
NSN 5915-01-540-5443