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 5925-01-141-7586
NSN 6110-01-103-3142
NSN 5915-01-223-3280
NSN 6320-00-593-0379
NSN 5855-01-380-9950
NSN 5950-01-051-3340
NSN 5950-01-005-0111
NSN 5990-01-558-4536
NSN 6145-00-807-3441
NSN 6220-00-346-8943
NSN 5998-01-361-9838
NSN 6135-01-238-2878