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 5960-00-137-7692
NSN 6650-01-535-1120
NSN 6650-00-641-6139
NSN 6130-00-960-0275
NSN 5990-00-170-4239
NSN 5998-01-214-2191
NSN 5930-01-497-5596
NSN 5999-00-095-3805
NSN 5855-00-256-5562
NSN 5920-01-142-5750
NSN 6650-01-562-0096
NSN 5999-01-197-5380