براغي ذات رأس أسطواني 1-1/4-7 × 7 بوصة | رأس مسطح محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي أكسيد أسود حراري

The flat head design on these 5/8-inch screws sits flush against my jig table, which is exactly what I needed. The black oxide finish handled a light oil bath without any rust forming during a weekend project. These brute bolts have held solid through repeated torquing so far.

Finally found some longer socket cap screws that actually fit my jig setup perfectly. The partially threaded design made install on the fixture plate much easier than fully threaded bolts would have.

The black oxide finish on these screws gives them a nice, professional look and seems to hold up well against minor scuffs during assembly. The hex socket drive made installing them in my jig a breeze with no stripping.