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 5935-00-554-0244
NSN 6130-01-237-5992
NSN 5915-01-147-5906
NSN 6130-01-528-4527
NSN 5925-00-144-0482
NSN 6620-00-351-9949
NSN 6620-01-227-0433
NSN 5905-01-222-0927
NSN 5935-01-233-8515
NSN 5945-01-188-9567
NSN 5920-00-280-4007
NSN 5950-01-368-6075