HOLO-KROME 73164 5/8-18 × 3-1/2" براغي غطاء مقبس | محرك سداسي | سبيكة فولاذ أكسيد أسود حراري (25 / عبوة)

I needed some long, sturdy screws for a jig I was building, and the 3-1/2" length with the hex drive made tightening them into tight spots much easier. They threaded cleanly without any binding.

The black oxide finish on these cap screws looks clean and seems durable—exactly what I hoped for rebuilding a tool holder. They threaded smoothly into my jig without any binding, solid feel all the way.

Needed some replacements for a press jig I’m rebuilding, and the thermal black oxide coating on these feels like it’ll hold up way better than the old zinc-plated ones. The hex socket drive made installation easy even in a tight spot.