HOLO-KROME 720002510 1/2-13 × 4-3/4" براغي ذات رأس أسطواني | محرك سداسي | فولاذ سبائكي مع أكسيد أسود حراري (10 / عبوة)

These replaced the old cap screws on my milling machine jig perfectly. The black oxide finish seems durable enough to resist shop oil, and the threads engaged smoothly right out of the package.

Needed a heavy-duty bolt for a press fixture, and the black oxide finish is a nice touch—resists oil stains better than plain steel. The hex socket drive made installation straightforward with a standard Allen key.

These are exactly the length for my jig rebuilds, and the black oxide finish looks clean and professional. The hex socket drive seated perfectly with no wobble, making install quick.