براغي رأس أسطواني 5/16-24 × 2-1/2" | محرك سداسي برأس زر | فولاذ سبائكي مؤكسد أسود حراري (100 / عبوة)

Needed exactly 100 of these for a jig I’m building, and every single screw has a clean hex socket and consistent threads. The black oxide coating looks durable and should hold up well in my setup.

The thermal black oxide finish held up perfectly against the coolant spray on my mill, and the hex socket drive seated cleanly every time. Threads ran smooth through the tapped holes with zero binding. These will be my go-to for fixture work from now on.

Had to rebuild a jig this weekend and these button head screws were exactly what I needed—the hex socket drive made installation quick without stripping. The black oxide finish kept them from showing any scratches, even when I overtightened one a bit.