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 6240-00-151-5382
NSN 5975-01-591-2625
NSN 5855-01-420-0851
NSN 6650-01-089-6192
NSN 5910-00-878-1023
NSN 6685-00-707-4842
NSN 6645-01-361-4813
NSN 5965-00-722-7574
NSN 6150-01-159-7657
NSN 5925-01-150-1830
NSN 6650-01-065-1704
NSN 6610-01-364-0294