HOLO-KROME 720001177 براغي رأس مقبس مقاس 1/4-20 × 4-1/2" | محرك مقبس سداسي | سبائك فولاذية بأكسيد أسود حراري (50/عبوة)

The hex drive on these cap screws made tightening them into a tight spot on my tooling fixture much easier than using a regular bolt. The black oxide finish seems durable and hasn’t chipped during assembly.

Swapping out some old machine screws for these black oxide ones made my jig setup look a lot cleaner. The 4-1/2 inch length was just right for a custom tooling fixture I was building.

These are the real deal for any serious machine work. The black oxide finish gives them a nice, consistent look and seems to resist rust well out of the package. Exactly the quality you need for jig and fixture building.