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 6645-01-361-8947
NSN 6320-00-845-3261
NSN 6130-01-421-6864
NSN 6650-00-992-4540
NSN 6320-01-506-9439
NSN 5855-01-308-0955
NSN 2925-01-368-1333
NSN 6135-00-935-8769
NSN 6240-01-553-6007
NSN 6105-01-598-7590
NSN 5905-01-419-2080
NSN 6150-01-090-0720