M20-2.5 x 210mm 六角頭螺絲 | 8.8級鋼鍍鋅 | 部分螺紋 (10/包)

Installed these on a large jig frame and the partial threading made alignment much easier. The hex head gave my socket a solid bite with zero rounding.

Zinc plating looks even and clean, and the hex heads seat nicely in a socket without any stripping. These M20s drove in smooth for our press frame rebuild, and the class 8.8 rating gives me confidence they’ll hold up under repeated torque.

The partial threading on these is exactly what I needed for bolting into a heavy steel frame, and the zinc coating looks clean and uniform. All ten arrived with crisp, sharp threads that engaged smoothly—no chasing or filing required.