M16-2 x 220mm 外六角螺絲 | 10.9級鋼 黃鋅鍍層 | 半牙（10顆/包）

The hex heads on these M16 bolts grip my socket perfectly without slipping, making assembly much smoother. The yellow zinc finish looks clean and seems sturdy for heavy equipment use.

I was a little worried the 220mm length would be too long for my machine mounts, but the partial thread allowed just enough grip depth. The hex heads gripped the socket perfectly without any rounding. Solid fasteners for heavy equipment.

The partial threading on these M16-2 screws made aligning my equipment frame much easier than fully threaded bolts. The hex head grips the socket perfectly even under heavy torque. A solid industrial fastener for the price.