M12-1.75 x 40mm 소켓 캡 나사 | 접시머리 육각 소켓 드라이브 | 풀 스레드 | 12.9급 합금강 아연 도금 (100개/팩)

The hex socket drive made installation much easier than dealing with a standard hex key, and the zinc coating on these 12.9 alloy steel screws looks like it will hold up well in my tooling fixtures.

Pulled these out of the bag and the zinc plating looks even all over, no rough edges on the threads. They seated perfectly into my jig fixture without any binding, and the hex socket drive gave a solid grip on the Allen key. For a hundred pieces at this price, they're exactly what I needed for tooli

Threads are clean and the hex socket drives true—no stripping even on the third install. Zinc plating looks uniform and they fit perfectly in my jig setup. Exactly what I needed for a solid 12.9 hold.