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 6135-01-542-5902
NSN 6145-01-575-6447
NSN 5935-01-351-2387
NSN 6650-01-376-6965
NSN 4140-00-736-4224
NSN 5915-01-132-8336
NSN 5930-00-973-5769
NSN 6650-01-018-7371
NSN 2925-01-513-0720
NSN 5990-01-277-2118
NSN 5999-01-204-2875
NSN 5950-01-571-5609