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 5915-01-166-2757
NSN 5990-00-267-9956
NSN 5945-00-658-3468
NSN 5950-01-613-1004
NSN 6150-00-661-0184
NSN 5925-01-588-1762
NSN 5999-00-354-4613
NSN 5975-01-080-6643
NSN 6685-01-185-3968
NSN 5998-00-281-4321
NSN 5996-00-594-8587
NSN 6105-01-491-2045