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 6650-00-791-1637
NSN 6240-01-362-4166
NSN 5950-00-370-3956
NSN 4140-01-628-6800
NSN 5945-00-778-3033
NSN 6320-01-166-3602
NSN 7035-01-144-3345
NSN 5945-01-597-9559
NSN 6320-01-362-9518
NSN 5920-01-382-5323
NSN 5835-00-694-8592
NSN 5835-01-043-1576