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 6620-01-431-9176
NSN 6610-00-518-4919
NSN 6150-00-481-4116
NSN 5835-00-933-9609
NSN 5835-01-010-3103
NSN 5930-01-644-0753
NSN 5920-01-181-6369
NSN 5990-00-734-7285
NSN 7035-01-546-2769
NSN 6220-01-510-2507
NSN 6110-01-136-1497
NSN 6610-00-868-9457