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 6145-01-518-0574
NSN 5945-01-285-6635
NSN 6685-01-227-4751
NSN 5990-01-126-5824
NSN 5965-01-430-4654
NSN 6110-01-538-3148
NSN 6150-01-505-6170
NSN 5998-00-961-7067
NSN 5996-01-181-7057
NSN 4140-00-890-3043
NSN 6105-00-185-1579
NSN 6135-01-265-1384