What it is
Hi-Lok (LISI), Protruding shear head, 3/8" (-12) diameter, max grip 0.375" (-06 = 6/16")
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
HL10-12-6 | SpecLok