HOLO-KROME 72012 براغي رأس مقبس #3-48 × 1/4 بوصة | محرك مقبس سداسي | سبيكة فولاذية معالجة حرارياً بأكسيد أسود (100/عبوة)

The black oxide finish on these screws looks clean and evenly applied, and the hex socket drive grips perfectly without stripping. I've used a dozen so far on a small fixture and every one threaded smoothly. For precision assemblies, these are exactly what you need.

Picked up a pack for some small jig work and the black oxide finish is holding up nicely on the threads. These #3-48 screws seat firmly with the hex drive and feel much stronger than the standard stainless ones I've used before.

Exactly the right size for my jig build, and the hex socket drive made seating them in tight spots a breeze. The thermal black oxide finish seems durable and hasn’t shown any wear after a few days of use. I’ve already ordered another pack.