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 6145-01-634-0388
NSN 6650-01-381-2972
NSN 6645-00-270-6817
NSN 6130-01-337-5177
NSN 6620-01-223-9157
NSN 6220-01-491-4571
NSN 5990-01-544-0364
NSN 5930-01-100-5281
NSN 5996-01-234-6084
NSN 5998-01-543-0727
NSN 5920-00-486-8822
NSN 6130-01-487-1156