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 6620-01-110-6803
NSN 2925-00-078-0525
NSN 6650-00-754-2276
NSN 2925-00-441-8252
NSN 6220-00-145-1423
NSN 6105-01-522-1880
NSN 5996-00-469-0737
NSN 5985-00-657-1578
NSN 5895-01-372-7636
NSN 5855-00-862-3345
NSN 5905-01-388-5255
NSN 6650-00-472-8486