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 5835-01-598-8262
NSN 5975-01-523-3364
NSN 5905-00-735-1778
NSN 5996-00-127-8824
NSN 6105-01-293-2760
NSN 6240-01-223-4917
NSN 5960-01-353-3302
NSN 6645-01-246-7129
NSN 5990-00-242-3754
NSN 5950-00-418-9602
NSN 5915-01-471-7814
NSN 6220-01-068-4066