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 6135-00-789-2865
NSN 6150-01-328-7444
NSN 5920-01-383-0300
NSN 6110-01-025-0086
NSN 5996-01-455-7666
NSN 5930-00-866-6599
NSN 5996-01-119-4688
NSN 6105-00-414-8539
NSN 6150-01-330-0585
NSN 5925-00-961-9179
NSN 6320-01-564-0893
NSN 6220-01-168-2078