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 5920-01-188-0048
NSN 5950-01-185-7347
NSN 6105-01-611-9920
NSN 5985-00-107-8994
NSN 5935-01-349-4911
NSN 6220-01-526-1469
NSN 6220-01-327-4597
NSN 6610-00-207-4207
NSN 7035-01-462-1957
NSN 5990-00-147-3144
NSN 6620-01-504-5756
NSN 6240-00-930-4206