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 6135-01-156-4627
NSN 5965-00-905-7561
NSN 7035-01-570-2565
NSN 5998-00-961-8637
NSN 5905-00-916-9066
NSN 7035-01-291-1770
NSN 5895-01-562-8099
NSN 5999-00-327-4401
NSN 4140-01-106-8904
NSN 5965-01-336-5107
NSN 5925-01-417-5445
NSN 5920-01-165-8480