براغي رأس مقبس 5/16-18 × 3-1/2 بوصة | رأس مسطح بمقبس سداسي | ملولبة جزئيًا | فولاذ سبائكي مؤكسد أسود حراريًا (100 / عبوة)

The black oxide finish on these is perfect for my tooling setup—no glare, and they seat flush without binding in the fixture. Threads were clean and started by hand every time, which saved me a ton of fumbling on a tight assembly. For a hundred pieces at this price, the consistency is hard to beat.

Used a handful of these for a jig I’m building, and the partial threading made alignment much easier than expected. The hex socket drive gripped securely without stripping, even with some muscle behind it.

The black oxide finish on these is holding up well in my jig setup, no rust after a few weeks in a damp shop. They seat flush with the flat head design, which was exactly what I needed for a tight clearance.