HOLO-KROME 64006 #4-40 × 1/2 بوصة براغي رأس مقبس | رأس زر بمحرك مقبس سداسي | سبيكة فولاذية أكسيد أسود حراري (100/عبوة)

The black oxide finish on these screws gives them a nice, uniform look for my precision assembly project. They seated cleanly into the threaded holes without any binding, which was a relief.

I needed a small batch for a jig I was building, and these #4-40 screws fit the holes perfectly. The button head sits flush enough for tight spaces, and the pack gives you plenty of extras.

The black oxide finish on these screws gave them a nice, uniform look and held up well during assembly—no chipping or flaking. I used them for a small jig project and all 100 pieces had clean threads that drove in smoothly. Exactly what I needed for precision work.