براغي رأس مقبس 2-4-1/2 × 3-1/2 بوصة | محرك مقبس سداسي | ملولبة بالكامل | فولاذ سبائكي أكسيد أسود حراري

The black oxide finish on these screws gives them a nice, durable look that resists chipping during assembly. They threaded smoothly into my jig components without any binding, and the full threading made alignment effortless. Exactly what I needed for heavy-duty tooling work.

The hex socket drive really grabbed the threads perfectly on my jig fixture, and the thermal black oxide finish seems tough so far. Exactly what I needed for tooling work.

I needed a few for a small precision assembly, and the hex socket drive made tightening in tight spots much easier than a standard wrench. The black oxide finish also seems like it will stand up to regular use without rusting.