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 6220-01-271-6121
NSN 5925-00-561-9648
NSN 5950-01-181-4799
NSN 6650-01-407-4653
NSN 4140-01-557-5342
NSN 5835-01-123-8305
NSN 5905-01-652-1867
NSN 5915-00-818-3393
NSN 6685-01-159-2687
NSN 6150-01-039-9386
NSN 4140-01-158-6976
NSN 5835-00-235-6960