براغي تثبيت بنقطة كوب M4 × 25 مم | فولاذ سبائكي (500/عبوة)

These cup point screws really hold their grip under high torque, much better than the hex drive ones I've used before. The 4mm thread cut smoothly into my mild steel jig plate without any wobble. A solid 500-pack for the price.

Needed a set screw that wouldn’t strip under constant vibration, and the hex socket drive on these gives great bite even in cramped spaces. The alloy steel feels tough and holds torque without rounding out. Solid value for a bulk pack.

The cup point bites into the shaft firmly, and the hex socket drive made tightening them in a cramped motor mount a breeze. All 500 arrived clean and uniform, no burrs or duds in the batch.