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 6240-01-442-7746
NSN 5915-01-245-6142
NSN 5910-00-224-9356
NSN 6645-01-651-2743
NSN 5965-01-260-5781
NSN 5985-01-433-7266
NSN 5985-01-477-0352
NSN 6240-01-187-7758
NSN 5895-00-615-6503
NSN 5950-01-505-6031
NSN 5915-01-323-6952
NSN 5835-00-341-5441