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 6110-00-488-4476
NSN 6135-00-162-2437
NSN 5990-01-463-2279
NSN 5855-01-591-0466
NSN 6135-01-156-4627
NSN 7035-01-085-5955
NSN 5915-01-605-3326
NSN 5985-01-612-0805
NSN 5990-01-572-3137
NSN 5965-00-267-4173
NSN 7035-00-849-5526
NSN 6135-00-080-9176