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 5990-01-011-0683
NSN 5855-00-300-1873
NSN 6150-01-398-7309
NSN 6135-01-485-4512
NSN 5985-01-348-6579
NSN 5910-01-500-1601
NSN 5990-00-797-7649
NSN 4140-00-067-2590
NSN 5998-01-414-7244
NSN 5895-01-203-7242
NSN 5920-01-164-8260
NSN 6150-01-590-2603