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 6645-01-603-9331
NSN 5930-01-212-8939
NSN 5835-00-466-3075
NSN 2925-00-341-3336
NSN 5915-00-363-9571
NSN 5990-00-878-1973
NSN 6150-00-456-0775
NSN 5965-00-150-1144
NSN 5905-01-044-5606
NSN 5975-01-315-6378
NSN 5855-01-470-4845
NSN 5915-01-517-3920