HOLO-KROME 72286 براغي رأس أسطوانية 5/8-11 × 4 بوصة | محرك سداسي | فولاذ سبائكي مؤكسد حراريًا أسود (25 / عبوة)

The black oxide finish on these screws held up perfectly during a recent jig build—no chips or scratches after tightening. They threaded smoothly into tapped holes without binding.

Used a few of these to build a sturdy jig for my drill press, and the thermal black oxide finish seems like it'll resist rust better than the uncoated bolts I used before. The 5/8-11 thread engaged smoothly into the tapped holes.

The hex socket drive seats my Allen key perfectly with zero wobble, and the 5/8-11 threads cut cleanly into my jig plate. All 25 came out of the box with a consistent black oxide finish, no burrs or duds. These are solidly built for heavy machinery work.