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 6130-01-264-8052
NSN 6240-01-600-2774
NSN 6220-01-006-3057
NSN 6320-00-908-6841
NSN 5835-01-242-9806
NSN 5950-01-343-7274
NSN 6240-01-044-0073
NSN 6150-00-057-1527
NSN 5895-00-199-4964
NSN 5915-00-966-7668
NSN 6135-00-948-7061
NSN 5965-01-367-9357