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 5930-01-088-6920
NSN 6685-01-608-3733
NSN 6220-00-338-1086
NSN 5945-01-350-1997
NSN 5895-01-261-9616
NSN 6645-01-465-0115
NSN 5835-01-411-7050
NSN 5998-01-605-3808
NSN 6150-00-837-8533
NSN 6105-01-317-3332
NSN 5985-01-435-5082
NSN 5975-01-592-3878