براغي رأس أسطوانية مقاس 9/16-18 × 5 بوصة | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي مع أكسيد أسود حراري (10 / عبوة)

The black oxide finish on these screws looks sharp and held up fine during assembly, no chipping. Thread engagement felt precise in my jig, and the 5" length with partial threading gave me plenty of grip without bottoming out.

Needed some heavy-duty cap screws for a jig I'm building, and the partially threaded design on these 5-inch ones made alignment a breeze. The black oxide finish feels solid and should hold up well in the shop.

Finally got these to replace some worn bolts on a press fixture and the black oxide finish really resists oil stains better than plain steel. The hex socket drive made installation a breeze even in tight spots.