HOLO-KROME 72240 براغي رأس أسطوانية 1/2-13 × 2-3/4 بوصة | محرك سداسي | فولاذ سبائكي مؤكسد حراري أسود (25/عبوة)

The black oxide finish on these bolts gives them a nice, uniform look and they threaded cleanly into my jig without any binding. Used a dozen on a fixture build so far and the hex drive has held up perfectly under my impact driver.

The socket drive seated perfectly with my hex key, no wobble or stripping even when I torqued them down on the jig. Thermal black oxide gives them a clean, uniform look that holds up well against shop grime so far.

I needed these for a jig I was building, and the 2-3/4" length was exactly right for the application. They threaded in smoothly without any binding.