HOLO-KROME 64004 #4-40 × 3/8" براغي رأس كبس | رأس زر محرك سداسي | سبيكة فولاذية مؤكسدة حرارياً سوداء (100 / عبوة)

The black oxide finish on these screws really resists wear better than the plain steel ones I've used before. They fit perfectly into the jig I'm assembling without any binding or stripped heads.

Had to order these for a fixture I'm building, and the uniformity across the entire pack is impressive. The button heads give a nice low profile, and the thermal black oxide looks really clean, plus they thread smoothly into tapped holes without any binding.

The black oxide finish on these screws looks clean and professional, and they seated perfectly in my fixture plate without any stripping. The socket drive made installation easy even in tight spots on my jig.