براغي ذات رأس مقبس | مقبس سداسي | خيط جزئي | فولاذ سبيكة أكسيد أسود حراري (50 / عبوة)

The black oxide finish on these screws really holds up well in my jigs—no rust after weeks of cutting fluid exposure. The hex socket drive took a lot of torque without stripping, which was my main concern. Exactly what I needed for precision tooling work.

I used these to rebuild a set of die fixtures, and the black oxide finish held up perfectly under the shop lights. The hex socket drive made installation quick without stripping—just the right grip for a tight fit. For the price per piece, these are hard to beat for heavy-duty tooling.

Replaced the old bolts on a custom jig with these, and the black oxide finish blended right in with the rest of the tooling. The hex socket drive made installation straightforward, and the partial threading gave a clean hold.