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 5990-01-035-9673
NSN 5925-01-455-4411
NSN 6150-00-791-9511
NSN 6650-00-894-8634
NSN 5975-01-452-5163
NSN 5905-01-134-5241
NSN 6220-00-181-9698
NSN 5855-00-327-2112
NSN 6620-01-131-6980
NSN 6320-01-440-4982
NSN 5915-00-186-9346
NSN 5990-00-038-6482