M20-2.5 x 130mm 內六角螺絲 | 平頭六角驅動 | 部分螺紋 | 10.9級合金鋼 熱處理黑色氧化 (25 / 包)

The 130mm length is exactly what I needed for a heavy jig assembly, and the partially threaded section aligns perfectly. Threads cut clean and the hex socket drove on without any cam-out. These are solid for the price.

The black oxide finish on these screws looks professional and seems durable. I used them to secure steel brackets for a heavy assembly table, and the hex socket drive made torquing them down effortless. A solid choice for any machinery project.

I’m using these to bolt down a heavy press tool, and the partially threaded shank makes alignment a lot easier. The hex socket drive takes a standard Allen key without slipping, and the black oxide finish seems durable.