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 6240-01-476-7935
NSN 5920-00-172-9232
NSN 5950-01-357-7451
NSN 6620-01-469-7828
NSN 5920-01-390-8273
NSN 5920-01-359-2846
NSN 5960-00-505-1577
NSN 5930-01-158-5694
NSN 6620-01-621-0719
NSN 5905-01-634-0595
NSN 6650-01-620-2026
NSN 5999-00-098-8790