براغي رأس أسطوانية HOLO-KROME 60112 3/8-16 × 2-1/2 بوصة | محرك سداسي برأس مسطح | فولاد سبائكي مع أكسيد أسود حراري (50 / عبوة)

The black oxide finish on these screws looks and feels properly done—no flaking even after I torqued them down on a tooling plate. Threads cut clean and seated flush, so my precision assembly stayed square without any wobble.

Used three of these on a jig fixture this morning and the flat head seated flush with zero wobble. The thermal black oxide finish wiped clean after cutting fluid got all over them, which I didn't expect. Sockets grabbed tight with a hex key on all fifty pieces.

The black oxide finish looks great and seems durable, and the hex socket drive made installation a breeze on my jig. These 3/8-16 screws are perfect for tooling projects where you need a clean, flush fit.