براغي ذات رأس مقبس 7/8-9 X 4-1/2" | محرك سداسي | حبيبات نايلون | ملولبة جزئيًا | فولاذ سبائكي معالجة حرارية سوداء (10 / عبوة)

Installed these in a jig fixture I’m building and the nylon pellet really locks the thread tight without needing extra adhesive. The thermal black oxide finish gave them a clean, professional look and they held up perfectly under torque.

I needed some heavy-duty screws for a jig I’m building, and these 7/8-9 x 4-1/2" cap screws fit perfectly—the hex socket drive made installation a breeze with my Allen wrench. The partially threaded design held tight where I needed it, and the black oxide finish hasn’t shown any wear yet.

The black oxide finish on these screws is holding up nicely during daily use on my machinery jigs, and the hex socket drive grabs securely without stripping. I’ve already used half the pack for precision assemblies, and they’ve been solid so far—no complaints.