براغي ذات رأس أسطواني بمقبس 1/4-20 X 2-5/16" | محرك سداسي | ملولبة جزئياً | فولاذ سبائكي مع أكسيد أسود حراري (100/عبوة)

The black oxide coating on these screws matched perfectly with my dark machinery frame, no glare. I used a dozen for a jig build and the hex socket drive gripped firmly without stripping. Solid feel for the price.

The thermal black oxide finish held up perfectly during assembly, no chips or flaking even when I torqued them into a steel fixture. Thread engagement felt smooth all the way down, and the partially threaded design gave just the right grip for my tooling setup.

Needed a specific length for a jig I was building and these 1/4-20 partially threaded screws fit the bill perfectly. The hex socket drive made installation quick and clean.