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 6130-00-513-7740
NSN 7035-01-354-9382
NSN 5915-00-992-9547
NSN 5915-01-431-4256
NSN 6610-01-010-2112
NSN 5855-00-100-9003
NSN 5999-00-670-4673
NSN 5965-00-455-7581
NSN 5895-00-691-6299
NSN 6150-00-538-9887
NSN 5895-00-791-1343
NSN 5996-01-492-1695