براغي ذات رأس مقبس HOLO-KROME 72115 1/4-20 × 4 بوصة | محرك سداسي مقبس | فولاذ سبائكي مع أكسيد أسود حراري (100 / عبوة)

The black oxide finish on these screws looks professional and has held up well during assembly. They threaded smoothly into my workbench jig without any binding issues.

I needed some longer 1/4-20 socket cap screws for a fixture I was building, and these four-inch ones worked perfectly. They seated cleanly in my jig without any wobble, and the black oxide finish seems durable enough to resist minor shop grime.

The black oxide finish on these screws is really consistent and holds up well in my jig setup without any rust issues. The socket drive engagement feels precise, and the 4-inch length is exactly what I needed for some deeper fixtures.