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 6130-01-467-2561
NSN 5905-01-395-0093
NSN 5945-00-332-6954
NSN 6240-00-269-9477
NSN 6110-01-411-9297
NSN 5930-01-483-7378
NSN 6685-01-303-8335
NSN 5998-01-418-1624
NSN 5996-01-269-9869
NSN 5985-01-467-8791
NSN 6320-01-512-2031
NSN 6220-01-020-7596