HOLO-KROME 68050 براغي رأس مقبس مقاس 3/8-16 × 1-1/2 بوصة | محرك سداسي منخفض الرأس | فولاذ سبائك أكسيد أسود حراري (100 / عبوة)

The black oxide finish on these screws looks really professional and seems durable. I used them for a jig setup in my shop and they threaded cleanly into tapped holes without binding.

These low head screws fit perfectly into a tight spot on a precision assembly where a standard cap screw wouldn't clear. The black oxide coating seems durable and the hex drive engaged cleanly without any stripping.

I used these to repair a jig at the shop and the thermal black oxide finish seemed to hold up better than the plain steel ones I had before. The hex drive engaged smoothly with my Allen key, no slipping at all.