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 5950-01-062-4329
NSN 5835-01-303-6563
NSN 4140-01-384-1735
NSN 5915-01-079-9014
NSN 2925-00-120-9302
NSN 5975-00-310-1099
NSN 6150-01-191-8571
NSN 5930-00-596-9276
NSN 6610-00-149-1534
NSN 6645-01-428-3576
NSN 5920-01-367-2542
NSN 6610-00-034-3709