براغي رأس أسطوانية HOLO-KROME 77552 مقاس 1/2-20 × 5-1/2 بوصة | محرك سداسي | فولاذ سبائكي مؤكسد حراريًا أسود (25 / عبوة)

The black oxide finish on these screws slid right into place without any binding, and the hex socket drive gave me solid torque control. I used them to secure a heavy-duty fixture on my milling machine, and they held tight under vibration. For 25 pieces at this price, you can't beat the quality.

These threaded perfectly into the jig I’m building, and the black oxide finish seems tough enough to resist rust. They’re solid without any wobble.

I needed some heavy-duty screws for a jig I’m building, and these socket caps fit perfectly with zero wobble. The hex drive grabbed easily without stripping, and the black oxide coating hasn’t scratched during handling.