HOLO-KROME 73134 براغي رأس مقبس 1/2-20 × 1-1/2 بوصة | محرك سداسي | فولاذ سبائكي مؤكسد أسود حراري (50 / عبوة)

I needed a set of high-torque socket cap screws for a jig I’m building, and these 1/2-20 x 1-1/2" ones fit perfectly. The thermal black oxide coating looks sturdy and resists scratches well, so they should hold up during repeated adjustments.

I've been using these in a jig assembly and the thermal black oxide finish seems tough enough to resist chips and scratches. The thread engagement feels precise, no binding at all.

The hex socket drive grips the Allen key perfectly with zero wobble, which made torquing these into my fixture plate a breeze. Threads ran smooth and clean into the tapped holes, and all 50 in the pack had consistent machining. These are going straight into my permanent jig setup.