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 6130-00-790-0071
NSN 6130-00-141-4319
NSN 5950-01-267-9931
NSN 6240-01-077-1127
NSN 5915-00-958-5748
NSN 6110-01-157-3031
NSN 6645-00-547-4388
NSN 6135-01-482-7901
NSN 5990-00-964-6422
NSN 6135-01-100-3593
NSN 5915-01-323-9030
NSN 4140-01-571-1584