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 5996-00-598-4839
NSN 5960-01-247-4560
NSN 5895-01-188-7470
NSN 6150-01-507-6268
NSN 5925-01-237-2501
NSN 5965-01-581-8908
NSN 5925-01-422-4748
NSN 6105-01-447-2984
NSN 5930-01-173-6884
NSN 6240-00-469-6242
NSN 5960-01-282-2386
NSN 2925-00-215-4954