M6-1 x 75mm 內六角螺絲 | 六角驅動 | 半螺紋 | 12.9級合金鋼鍍鋅 (100個/包)

The hex socket drive bit cleanly into my driver without any wobble, and the zinc plating looks uniform across all 100 pieces. These 75mm screws held a steel bracket rock-solid in my precision assembly, and the 12.9 grade gives me real confidence under load.

The threads are clean and the hex socket drive grips the Allen key perfectly, no stripping even under real torque. I needed these for a jig setup and the 12.9 alloy steel feels solid enough for repeat use, though the zinc finish is a bit thin if you're rough with them. For the price per hundred, the

Used these for a jig build and the partial threading held tension without stripping. The zinc coating seems decent enough, though I had to chase one or two with a tap. Solid value for a hundred pack.