M20-2.5 X 130mm 內六角螺絲 | 平頭內六角驅動 | 部分螺紋 | 12.9級合金鋼鍍鋅 (25個/包)

The hex socket drive seated perfectly in my wrench, and the zinc plating has that clean, even finish that suggests they'll hold up well. The 12.9 alloy steel feels reassuringly dense and solid for these heavy M20 bolts.

Needed a solid fastener for a jig fixture in my shop, and the partial threading on these gave me enough grip depth without bottoming out. The hex socket drives cleanly with a standard tool, and they handled the torque just fine.

Used these for mounting heavy steel brackets in a fixture, and the Class 12.9 alloy steel feels really solid under torque. The partially threaded design gave me exactly the grip I needed for a tight assembly.