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 6240-01-197-3888
NSN 5930-01-416-1481
NSN 5950-01-556-1096
NSN 6150-01-004-8788
NSN 6135-00-248-4102
NSN 5965-01-481-2422
NSN 5990-01-425-2175
NSN 5945-01-283-5893
NSN 5835-01-391-4556
NSN 6130-01-504-1569
NSN 5950-01-423-7465
NSN 5960-01-206-0743