براغي ذات رأس أسطواني 1/2-13 × 4" | رأس مسطح مع محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي مع أكسيد أسود حراري (25/عبوة)

The black oxide finish on these looks uniform and clean, no flaking even after I torqued a few down on my fixture plates. The partial threads made aligning everything a breeze, and the hex socket drive grabbed perfectly every time.

Installed these on a jig I’m building for a milling setup last weekend, and the partially threaded design made alignment much easier. The hex socket drive is a nice upgrade over a standard hex head, no slippage when using an Allen key. Really solid feel for the price.

The black oxide finish on these is perfect for my jig fixtures — no glare off the heads and no rust issues so far. The hex socket drive seated cleanly every time, and the partial threading gave me exactly the grip depth I needed.