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 6110-00-269-2696
NSN 5920-01-062-5515
NSN 6145-00-978-8056
NSN 5835-01-235-1125
NSN 6145-01-215-2597
NSN 7035-00-541-8516
NSN 6650-01-630-2223
NSN 5990-01-080-9745
NSN 6620-00-527-6523
NSN 7035-01-361-8821
NSN 5835-01-279-9508
NSN 5855-01-362-6532