Special Features:

With 8 each threaded holes on round flange below hex nut 0.250 inch id by 28 threads per inch, nf threads, 1.062 inch across flats of hex nut, hexpart of nut has hole drilled through 0.060 inch id

Properties:

A nut, circular in shape, which may have wrenching facilities such as flats, holes, protrusions, slots or splines in or on the periphery or in the face opposite the bearing surface. For items having a thickness (or height) exceeding two times the outside diameter, use post, electrical-mechanical equipment. See also nut (1), plain, knurled. (when height or thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)