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 5998-01-336-2600
NSN 6110-00-313-9270
NSN 6645-01-495-0939
NSN 6620-00-699-5537
NSN 5935-01-089-5459
NSN 6650-00-520-5785
NSN 5835-01-100-3265
NSN 5915-01-065-1127
NSN 6110-01-174-9569
NSN 4140-00-258-3612
NSN 5985-00-517-7418
NSN 5950-01-393-3350