With triangular base on bottom ofnut with 3 each drilled holes 0.070 inch id by 0.125 inch long by 0.105 inch thick
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 5960-01-031-7992
NSN 6620-00-801-8885
NSN 6620-00-789-8684
NSN 4140-01-240-4616
NSN 5895-01-473-0273
NSN 6130-00-518-4305
NSN 5905-01-117-3599
NSN 5975-00-995-9110
NSN 5975-01-123-2147
NSN 5950-00-080-0445
NSN 5960-01-649-1341
NSN 5835-01-478-9428