براغي رأس مقبس 2-1/2-4 X 10" | مقبس سداسي | خيط جزئي | سبيكة فولاذ أكسيد أسود حراري

Took these out of the box and the black oxide finish looked uniform across all ten, no flaking or uneven spots. The partial threading held a jig together through a full shift without any give.

The hex socket gave me a solid grip without any slipping, and the black oxide finish held up perfectly against light rust in my humid shop. These screws feel strong enough for my jig builds without being overly stiff during adjustments.

The 2-1/2-4 threads cut cleanly into the steel plate I'm working with, and the hex socket drive makes tightening them a breeze. These screws feel solid and durable for my tooling setup.