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 6610-01-049-2661
NSN 6110-00-453-8971
NSN 6145-01-349-4280
NSN 5895-00-886-3158
NSN 5945-01-431-8124
NSN 4140-01-172-0084
NSN 6145-01-384-0908
NSN 6650-01-472-5028
NSN 5915-01-326-1470
NSN 6220-01-554-5913
NSN 5965-00-021-5620
NSN 5975-01-502-6167