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 6130-00-947-0870
NSN 7035-01-056-5350
NSN 6130-01-304-3395
NSN 5998-00-079-0199
NSN 5999-01-044-6063
NSN 5855-01-568-7216
NSN 5930-01-491-1942
NSN 5998-00-493-0336
NSN 5950-01-156-4956
NSN 5910-01-320-8622
NSN 5965-00-870-1980
NSN 5985-01-550-4089