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 6610-01-018-2431
NSN 5915-01-340-0650
NSN 5985-01-090-1627
NSN 5930-00-528-1918
NSN 6320-01-446-5985
NSN 4140-01-120-7640
NSN 5945-01-389-0006
NSN 6105-00-553-1458
NSN 6150-00-583-9878
NSN 6650-01-385-6799
NSN 5965-01-086-0081
NSN 6685-00-163-3116