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 6110-00-452-0448
NSN 5905-00-674-8430
NSN 6320-01-414-7099
NSN 6130-01-160-6130
NSN 6620-00-831-2737
NSN 5920-00-071-9241
NSN 6110-01-051-3643
NSN 5915-01-453-0200
NSN 5855-00-610-4052
NSN 5835-00-198-4936
NSN 6130-01-585-3739
NSN 2925-01-317-6973