HOLO-KROME 76448 M16-2 X 60mm 소켓 캡 나사 | 헥스 소켓 드라이브 | 합금강 열 블랙 옥사이드 (25개/팩)

Used these on a jig fixture that gets bolted and unbolted constantly, and the hex socket drive hasn't rounded out even slightly. The 60mm length seated perfectly in my M16 threads, and the whole pack came out of the box with zero burrs or defects. Exactly what I needed for precision work.

For my jig setup these M16 bolts threaded in smoothly without any binding, and the hex socket drive gave me great torque control. The 60mm length was exactly what I needed for a sturdy hold on that heavy fixture.

Just swapped out some old hardware on my jig with these M16-2 x 60mm socket cap screws, and the thermal black oxide finish is a nice upgrade—feels more durable than the plain steel I was using. The hex socket drive grabs tight without stripping, which is exactly what I needed for precision assembly