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 6150-00-165-5816
NSN 5965-01-187-8574
NSN 4140-00-087-4611
NSN 5925-00-299-8037
NSN 6320-01-370-4218
NSN 6135-01-290-6487
NSN 5925-01-408-6577
NSN 5990-01-251-2296
NSN 6145-01-412-7517
NSN 5950-01-387-7011
NSN 5925-00-364-7969
NSN 5975-01-485-2385