HOLO-KROME 64076 براغي رأس سداسية 1/2-13 × 1 بوصة | رأس زر بمحرك سداسي | سبائك فولاذ معالجة حرارياً بأكسيد أسود (25/عبوة)

I needed a full set of bolts for a jig I’m building, and these 1/2-13 socket cap screws fit perfectly and tightened smoothly with a hex key. The thermal black oxide seems nicely durable, and the button head profile sits flush without taking up extra space.

The black oxide finish on these screws really resists scratching during assembly, which was a concern with my shop jigs. They thread smoothly into tapped holes with no binding, and the hex drive holds the bit securely without stripping.

These button heads sit perfectly flush on my jig fixture, and the black oxide finish already saved me from a few rust spots in the shop. Took a 5/32 hex key without any wobble.