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 5999-01-544-9776
NSN 5910-01-390-7620
NSN 6645-00-171-9639
NSN 5910-00-902-0753
NSN 6135-00-932-3136
NSN 5855-01-632-3478
NSN 5835-01-250-2939
NSN 5975-00-369-7306
NSN 5920-00-937-3713
NSN 5855-00-198-3197
NSN 5930-01-270-2186
NSN 6685-00-907-7666