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 5895-01-634-0630
NSN 5975-01-415-5771
NSN 5835-00-257-2852
NSN 6610-01-314-0719
NSN 6610-01-112-8137
NSN 5920-01-016-2764
NSN 5920-01-196-0933
NSN 6685-00-877-5732
NSN 2925-00-035-5633
NSN 5985-00-807-9822
NSN 6320-00-593-0379
NSN 6650-00-917-0436