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 6130-01-204-2829
NSN 6130-01-573-7536
NSN 5910-01-341-8418
NSN 5920-01-205-7302
NSN 5835-01-244-8532
NSN 6620-01-627-0478
NSN 6320-00-506-2314
NSN 5996-00-256-0635
NSN 5915-01-643-5786
NSN 6220-01-162-7954
NSN 5960-00-917-5099
NSN 6110-00-468-6220