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 6135-01-329-7994
NSN 5998-00-920-9734
NSN 5935-01-437-8664
NSN 5965-00-181-0213
NSN 5925-01-371-2876
NSN 5915-01-438-2215
NSN 6105-00-884-4558
NSN 5915-01-216-1037
NSN 4140-01-252-8432
NSN 5835-00-160-0171
NSN 5999-00-246-6304
NSN 5998-01-410-8537