M16-2 x 130mm 소켓 캡 볼트 | 육각 소켓 드라이브 | 부분 나사산 | 12.9급 합금강 열처리 블랙옥사이드 (25개/팩)

The black oxide finish is holding up perfectly under repeated wrenching in my jig builds, and the 12.9 alloy steel feels rock solid at this 130mm length. Threading is clean and the hex socket seated without any wobble.

Finally, a socket cap screw that doesn’t strip the hex drive under torque—these held up perfectly when I tightened them into a jig fixture. The partial threading made alignment a breeze, and the black oxide finish has a nice, grippy feel that’s less slippery than bare steel.

The black oxide finish on these M16 screws held up perfectly during my jig assembly, no galling or wear even after torquing them down tight. The partially threaded design gave me just the right grip depth for securing steel plates, and all 25 pieces had clean threads with no burrs. Exactly what I ne