براغي رأس أسطوانية 1/2-12 × 4-1/2 بوصة | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي بأكسيد حراري أسود (25/عبوة)

I needed some heavy-duty screws for a jig I was building, and the 4-1/2" length was exactly what the job required. The hex socket drive gripped firmly without stripping, and the thermal black oxide coating looks like it will resist rust well in my workshop.

The black oxide finish on these screws gave my jig a clean, professional look and they threaded smoothly into pre-tapped holes without any binding. Tightened them down with a hex key and they held firm.

I needed some heavy-duty fasteners for a jig build, and these partially threaded 1/2-12 x 4-1/2" screws threaded in smoothly without any binding. The black oxide finish looks quality and should resist rust in my shop.