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 6645-00-881-9978
NSN 6320-01-578-6006
NSN 5960-01-624-1170
NSN 5999-01-092-4942
NSN 6145-00-230-5268
NSN 5960-00-951-1777
NSN 6645-00-780-5260
NSN 5975-01-006-2808
NSN 5999-01-406-6274
NSN 5910-00-916-3986
NSN 5935-01-044-4888
NSN 5915-01-345-1447