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 5835-00-892-3510
NSN 5998-00-288-5533
NSN 5950-01-518-4253
NSN 6685-00-520-8417
NSN 6240-01-442-7746
NSN 5950-01-126-1708
NSN 6620-01-416-1757
NSN 5930-01-227-1908
NSN 5935-01-411-5771
NSN 5985-01-099-4755
NSN 5975-00-140-8739
NSN 5915-00-287-5062