HOLO-KROME 730003160 3/4-16 X 3" 소켓 캡 스크류 | 육각 소켓 드라이브 | 합금강 열처리 블랙 옥사이드 (25개/팩)

Used a set to repair a heavy-duty press at work—the hex socket drive let me torque them precisely without stripping. Threads engaged smoothly and the black oxide coating seems tough enough to resist shop oil and grime. Exactly what I needed for high-stress machinery.

The thermal black oxide finish on these screws handled a full day of clamping fixtures without a single scratch, and the hex socket drive seated perfectly every time. They’re hefty and precise, exactly what you want for tooling work.

Went through a whole box mounting jigs and not one stripped or rounded out on me—the black oxide finish holds up way better than the plain steel ones I used to get. Threads are clean and the socket drive seats a hex key without any wobble.