HOLO-KROME 60072 1/4-20 x 2" 소켓 캡 나사 | 플랫 헤드 육각 소켓 | 합금강 열처리 블랙 옥사이드 (100 / 팩)

I needed a bunch of 2-inch flat heads for a precision tooling fixture, and the black oxide finish on these made them slide into countersunk holes perfectly without any binding. The hex socket drive felt crisp and didn't strip when torqued down, which saved me from hunting for replacements mid-projec

I've been using these in my custom jig setup, and the hex socket drive made installation much cleaner than Phillips heads. The thermal black oxide finish looks professional and seems to resist surface rust well so far. Great value for the quantity, especially for precision assemblies like this.

The black oxide finish on these 1/4-20 screws really holds up well in my jig setup—no rust after a month of use. They drive cleanly with a hex key and the flat head sits flush every time. Perfect for precision work where you need consistent thread engagement.