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 6135-01-513-1515
NSN 6150-01-043-1751
NSN 5999-01-397-5005
NSN 5996-01-123-9038
NSN 5960-00-415-1797
NSN 5920-01-581-1641
NSN 6320-00-977-3930
NSN 6130-00-958-1064
NSN 5985-01-361-4964
NSN 5960-01-443-3067
NSN 5945-00-208-4123
NSN 6150-01-261-6252