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 5999-01-246-5168
NSN 5930-00-153-7914
NSN 5915-00-082-1286
NSN 6685-01-367-7346
NSN 5998-00-153-9989
NSN 5895-01-360-6511
NSN 4140-01-514-0934
NSN 6240-01-602-7826
NSN 5975-01-556-0695
NSN 6240-01-067-6457
NSN 5855-01-375-2152
NSN 6145-01-442-5336