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 6220-00-199-3453
NSN 5895-00-278-5194
NSN 5920-01-524-4126
NSN 5999-01-534-3123
NSN 6650-01-553-0721
NSN 5935-00-137-9932
NSN 6320-00-116-3658
NSN 5925-00-243-7128
NSN 6610-00-971-2503
NSN 6135-00-819-8074
NSN 6650-01-068-5021
NSN 5999-00-035-4999