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 6240-01-544-9579
NSN 5895-01-247-2333
NSN 6685-00-839-6422
NSN 5935-01-383-1186
NSN 5895-01-181-1289
NSN 6610-01-451-5503
NSN 5960-01-599-9821
NSN 6135-01-475-7415
NSN 5990-01-353-3691
NSN 5920-01-168-7810
NSN 6145-01-198-2479
NSN 5945-01-588-8412