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 6645-01-428-3576
NSN 5835-00-921-1662
NSN 5945-01-335-4366
NSN 6135-01-278-9717
NSN 6685-00-527-7952
NSN 5930-01-133-1657
NSN 5998-01-332-3907
NSN 5920-01-322-7458
NSN 5915-00-165-2985
NSN 5990-01-476-9956
NSN 6610-00-466-3104
NSN 7035-00-205-8739