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 5915-00-064-9096
NSN 5975-01-605-0496
NSN 5925-01-600-2173
NSN 5950-01-283-3008
NSN 6105-00-885-3708
NSN 6150-01-196-5413
NSN 5985-01-029-6655
NSN 5950-00-446-2924
NSN 6650-01-618-4765
NSN 6645-01-149-9176
NSN 6220-01-568-6653
NSN 5945-01-207-8886