براغي تثبيت نقطة كوب M5 × 6 مم | فولاذ سبائكي (250/عبوة)

Finally a set screw that bites into the shaft without stripping; the cup point on these M5s holds fast even under moderate torque. I used them to secure a timing pulley and haven't had to retighten once.

The cup point on these M5 screws grips the shaft really well—I used them to secure a gear and haven't had any slippage. The 250-pack is enough for several projects, and the alloy steel feels sturdy for the price.

Finally found a set screw that actually stays put under vibration—these alloy steel ones bite into the shaft nicely. The cup point design makes them perfect for locking down a pulley on a small motor shaft I was working on. At 250 per pack, I’ve got spares for the next few projects.