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 6610-01-419-0929
NSN 6650-01-096-4993
NSN 4140-00-038-7577
NSN 5910-01-648-3588
NSN 6130-01-494-9940
NSN 5985-01-355-2152
NSN 5990-00-366-0112
NSN 5835-00-856-6744
NSN 6240-01-648-6370
NSN 5996-01-630-6436
NSN 6135-00-990-1822
NSN 5925-00-704-4491