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 6650-01-330-6740
NSN 6135-01-560-8130
NSN 5990-00-070-9608
NSN 4140-01-501-6031
NSN 6320-01-261-5983
NSN 6240-01-566-4629
NSN 6650-00-603-3296
NSN 6145-01-444-4509
NSN 5950-01-024-9201
NSN 5945-00-878-1984
NSN 6685-01-101-4195
NSN 5985-00-199-8997