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 5855-01-364-4478
NSN 5999-01-599-6973
NSN 6135-00-223-9563
NSN 6610-00-342-9825
NSN 7035-01-076-9621
NSN 5930-01-183-9889
NSN 6610-00-284-3093
NSN 5996-00-636-4849
NSN 5975-01-553-6972
NSN 5935-00-032-4726
NSN 6240-00-170-5302
NSN 5910-01-031-5933