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 5990-01-537-1553
NSN 5855-00-135-0797
NSN 6105-00-225-0189
NSN 2925-00-845-1480
NSN 6610-00-217-2194
NSN 5905-01-391-4983
NSN 6105-01-576-2242
NSN 5998-01-634-0604
NSN 5905-01-182-9293
NSN 6110-01-104-4777
NSN 6620-01-377-8178
NSN 5950-01-487-3750