M20-2.5 x 130mm 소켓 캡 나사 | 플랫 헤드 육각 소켓 드라이브 | 부분 나사산 | 클래스 10.9 합금강 열처리 블랙 옥사이드 (25개/팩)

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.