براغي HOLO-KROME 72154 3/8-16 X 3/4" رأس أسطواني | محرك سداسي | فولاذ سبائكي أسود حراري (100 / عبوة)

Needed a few for a jig I was building, and the hex drive seated perfectly without any stripping. The thermal black oxide finish seems tough and should hold up well in my shop.

The black oxide finish on these screws is consistent and hasn't chipped during assembly, which matters when you're working with tight tolerances on a precision fixture. Slightly more expensive than standard button heads, but the hex drive hasn't stripped out on me yet.

Installing these on a jig fixture, the threads cut cleanly and the black oxide finish held up well against minor scrapes. They seated flush with no binding, which saved me time during assembly.