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 4140-01-258-4046
NSN 5996-01-161-3832
NSN 5835-01-422-7393
NSN 6145-01-424-1351
NSN 6610-01-101-5909
NSN 5960-01-043-4770
NSN 6240-01-341-6579
NSN 5945-01-608-6173
NSN 5996-00-487-3184
NSN 5985-01-306-5405
NSN 5975-00-414-7143
NSN 5960-00-367-3735