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 5930-00-856-1120
NSN 6240-00-126-4551
NSN 6650-01-148-7911
NSN 5965-01-633-8849
NSN 2925-01-172-9209
NSN 6645-01-054-4423
NSN 6150-01-186-0259
NSN 5990-00-456-8793
NSN 4140-01-218-7205
NSN 5975-01-422-5102
NSN 6105-01-431-8998
NSN 5915-01-524-4157