براغي ذات مقبس أسطواني ذات نقطة كأس M4 × 8 مم | فولاد سبيكي (1000/عبوة)

Needed a reliable set screw for a stubborn pulley on my CNC router, and these M4 8mm ones with the hex socket drive made installation a breeze—tight fit even in cramped spots. The alloy steel feels sturdy, and the 1000-count pack means I’ve got plenty for future projects.

The cup point bites into the shaft nicely, so I don't have to worry about these backing out during vibration. The hex socket drive made tightening them in a tight bracket a breeze.

Used a full box on a conveyor repair last week and every single one seated cleanly in the pre-tapped holes. The cup point bites into the shaft nicely without walking, and the hex drive holds up to a cheater bar when needed.