Internal flange one end 0.644 in. Id
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.)
Classification: Nuts of iron or steel
NSN 5920-00-285-2245
NSN 5920-01-039-6118
NSN 5996-01-073-9742
NSN 6220-01-444-1889
NSN 5855-01-425-1330
NSN 6150-01-206-4624
NSN 6105-01-398-1674
NSN 5990-01-231-9608
NSN 6610-01-218-7668
NSN 6240-00-456-2578
NSN 6645-01-508-0345
NSN 5920-00-012-2000