HOLO-KROME 73076 5/16-24 X 1/2" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / عبوة)

The black oxide finish on these screws looks fantastic and shows zero wear after a solid week of use in a jig I assembled. The alloy steel feels tougher than the standard hardware store stuff, and the socket drive seated cleanly every time.

The hex fit in my driver was snug and precise, no wobble at all when tightening. Used a dozen so far for a jig build and they seated perfectly flush without stripping.

The black oxide finish feels properly done, no rough edges or flaking when I ran them into a steel fixture. Threads seated cleanly and the hex drive bit grabbed without any wobble, which is what I want for tooling that gets taken apart regularly.