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 5985-01-391-7665
NSN 7035-00-126-1899
NSN 6685-00-964-5262
NSN 5985-00-877-4224
NSN 5835-01-534-3172
NSN 6130-01-584-9733
NSN 5835-01-414-3258
NSN 5990-00-518-0684
NSN 6240-00-766-6802
NSN 5996-01-571-9384
NSN 6145-01-246-3988
NSN 6610-01-554-4921