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 6150-00-707-3950
NSN 6685-00-554-3825
NSN 5930-00-963-6735
NSN 6130-01-650-1738
NSN 5985-01-032-4371
NSN 6150-00-896-0037
NSN 5910-01-508-4674
NSN 5915-01-565-2307
NSN 6105-01-642-2709
NSN 6320-01-247-0898
NSN 2925-01-407-4958
NSN 5930-01-372-4570