What it is
Hi-Lok (LISI), 100° flush shear head, 1/4" (-8) diameter, max grip 0.6875" (-11 = 11/16")
Equivalents
No equivalent on file: no maker document names one and the government catalog lists none on its stock number.
Install tooling, by who made the part

The nose follows the maker, not the stock number: check the maker on the CoC or packaging.

Reference only: the drawing and its process spec govern. How to read this

Full detail: decode, cited documents, every stock number