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 5915-00-165-2738
NSN 5930-00-334-5926
NSN 4140-01-158-1401
NSN 5998-01-560-4470
NSN 4140-01-143-7180
NSN 5990-01-348-9829
NSN 6150-00-189-0292
NSN 2925-01-052-0636
NSN 6645-01-025-1002
NSN 5998-01-228-3104
NSN 6135-01-238-2878
NSN 5945-01-210-8060