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 5835-01-442-6482
NSN 6645-01-161-6926
NSN 4140-00-551-3151
NSN 5915-01-474-0241
NSN 7035-01-602-0464
NSN 5945-00-964-8677
NSN 6645-00-226-2270
NSN 6220-01-406-9621
NSN 6130-01-385-8554
NSN 6240-00-383-7668
NSN 6135-01-222-0703
NSN 5935-00-166-7455