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 5930-01-063-6559
NSN 6240-01-625-7262
NSN 6645-00-633-3824
NSN 4140-00-848-3218
NSN 5950-01-504-8639
NSN 5950-01-463-4331
NSN 5855-00-631-4565
NSN 6650-00-229-3790
NSN 5910-01-441-8640
NSN 5905-01-451-3186
NSN 6150-01-206-4425
NSN 5915-01-284-6276