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 5945-01-040-0909
NSN 5925-00-396-2412
NSN 5935-01-485-5680
NSN 5930-01-441-9317
NSN 5985-01-605-4479
NSN 5905-01-014-5472
NSN 5996-01-222-6378
NSN 5998-01-232-0945
NSN 6220-01-422-1429
NSN 5998-01-148-6741
NSN 5996-00-457-7735
NSN 5855-01-330-0088