M16-2 X 220mm 六角頭螺絲 | 8.8級鋼 鍍鋅 | 部分螺紋 (10個/包)

The zinc plating looks even and hasn't chipped after a week of tightening with a heavy wrench, which is exactly what I need for securing a jig frame. The 220mm length gives plenty of grip for thick flanges, and the hex head sat flush with my socket with zero wobble.

The partial threading on these M16 bolts made aligning the mounting plate way easier than fighting a fully threaded rod. Class 8.8 is plenty stout for my shop press build, no flexing under load. Fit right into a standard socket, no surprises.

Used these to mount a heavy motor to a steel frame, and the partial threading made alignment much easier. The zinc plating seems durable and the hex head took a socket wrench perfectly without stripping.