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 6145-01-551-1045
NSN 5895-01-009-1819
NSN 5999-01-188-8316
NSN 4140-00-597-5260
NSN 5975-01-273-0971
NSN 5895-01-626-3657
NSN 5960-00-287-9932
NSN 5960-01-589-6846
NSN 5905-01-218-8275
NSN 5915-00-142-6912
NSN 6130-01-415-0590
NSN 5999-00-247-1352