Small end has eight notches equally spaced
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 5950-01-247-1170
NSN 6685-00-010-8010
NSN 6145-01-364-6011
NSN 5998-01-449-1901
NSN 5998-01-325-9646
NSN 5935-00-452-5264
NSN 5985-00-412-0904
NSN 6145-00-800-5985
NSN 5996-01-088-7074
NSN 5985-00-922-1272
NSN 5935-00-042-7775
NSN 6650-00-629-8027