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 6610-00-897-5680
NSN 5985-00-809-5851
NSN 6110-01-155-8170
NSN 4140-01-033-1238
NSN 5998-01-140-8676
NSN 5895-00-100-4877
NSN 5998-01-646-1753
NSN 5999-01-415-1215
NSN 6240-00-776-1614
NSN 5999-01-079-8862
NSN 5835-00-240-9838
NSN 5915-01-057-0623