براغي رأس مقبس M27-3 × 240 مم | محرك سداسي المقبس | ملولبة جزئياً | فولاذ سبائكي فئة 12.9 بأكسيد حراري أسود

The black oxide finish on these cap screws resisted the initial torque well during a jig assembly. They seated cleanly in the hex socket without any wobble. A solid choice for heavy-duty tooling work.

Finally found M27 screws that thread smoothly into a heavy jig frame without galling. The black oxide finish holds up well against shop oils and grime so far. Three of these secured a tooling fixture that sees constant vibration, and they haven't budged.

I needed a heavy-duty bolt for a jig I'm building, and the partial threading on these 240mm screws made alignment a breeze. The hex socket drive also gripped perfectly without stripping.