براغي رأس أسطوانية مقاس 7/16-14 × 3-1/2" | رأس مسطحة بمحرك سداسي | خيط جزئي | فولاذ سبائكي بطبقة أكسيد أسود حراري (50 / عبوة)

Threads are clean and the hex socket drive bites perfectly without any stripping, even on the third install. The 3-1/2" length gave me just the right grip for my jig setup, and the thermal black oxide finish hasn't worn at all so far. Solid value for a 50-pack.

The black oxide finish is holding up great on my jigs, and the 7/16-14 threads threaded cleanly into every fixture I've built so far. The flat heads sit flush and the hex socket drives are easy to torque down.

The partially threaded design made a huge difference when I was bolting down a steel jig—the threads grabbed cleanly without bottoming out early. Black oxide finish looks sharp and didn't chip during installation. These felt solid for the price.