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 6645-01-139-0156
NSN 5895-01-143-7888
NSN 5999-01-067-8945
NSN 6150-01-370-5239
NSN 5930-00-051-1334
NSN 5915-01-107-8026
NSN 5835-01-502-9228
NSN 6240-00-455-7640
NSN 5910-00-596-3179
NSN 5990-01-294-6198
NSN 5930-00-023-8459
NSN 5930-01-246-5592