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 5990-00-067-6791
NSN 5895-01-352-6674
NSN 6220-00-998-2169
NSN 5975-00-125-6683
NSN 5915-00-867-8615
NSN 6320-00-646-3311
NSN 6620-00-880-1361
NSN 6620-01-534-2370
NSN 6685-01-573-7031
NSN 6150-01-366-5533
NSN 6105-01-458-6780
NSN 5920-01-305-3053