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 6145-01-085-6249
NSN 5950-01-355-4990
NSN 5925-01-566-7220
NSN 5835-01-485-0210
NSN 6130-01-525-2920
NSN 6145-01-360-2789
NSN 5998-01-571-1578
NSN 5855-01-068-3683
NSN 5920-01-543-3858
NSN 6610-01-431-8575
NSN 5915-00-233-6346
NSN 5930-00-115-5351