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 5925-00-018-3225
NSN 6145-01-558-7111
NSN 5975-01-434-3154
NSN 5915-01-525-7731
NSN 5950-01-394-4343
NSN 6645-01-426-8621
NSN 5925-01-167-7747
NSN 5835-00-794-7500
NSN 5996-01-433-2265
NSN 6130-00-135-9526
NSN 5855-01-062-5655
NSN 6110-01-420-1229