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 6145-01-644-9332
NSN 6240-01-061-7359
NSN 5895-01-630-9967
NSN 6110-01-379-4560
NSN 5915-00-425-6181
NSN 6650-00-161-4122
NSN 5910-01-166-5663
NSN 5945-00-604-9377
NSN 6135-01-552-1568
NSN 6145-00-106-0611
NSN 5965-01-063-7894
NSN 5925-01-303-6057