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 6650-00-842-5463
NSN 6150-01-233-0914
NSN 5915-01-076-4538
NSN 5935-00-215-3199
NSN 6150-01-152-9704
NSN 5998-01-383-0153
NSN 6685-01-658-5057
NSN 5930-01-017-1906
NSN 5990-01-507-7495
NSN 2925-01-267-1598
NSN 6645-01-163-9930
NSN 6110-01-409-2692