M20 X 60mm 滾花杯端內六角止付螺絲 | 合金鋼（每包25顆）

Grabbed a pack for a stubborn fixture that kept slipping under load, and the hex socket drive made all the difference in that tight spot. The knurled cup point really bites into the surface, and the alloy steel feels solid so far. Exactly what I needed for the job.

The hex socket drive makes tightening these in tight spots way easier than using a standard wrench. The knurled cup point tip also holds the screw firmly in place without slipping. Solid upgrade for my machinery.

I’ve been using these M20 screws to secure heavy vibration-prone panels, and the knurled cup point really bites into the surface without slipping. The 60mm length gave just enough thread engagement in my thick steel brackets.