HOLO-KROME 60120 7/16-14 X 1-1/4" 六角凹槽螺絲 | 平頭六角凹槽驅動 | 合金鋼熱處理黑色氧化物 (50 / 包裝)

Installed these in a jig fixture at work and the alloy steel held up perfectly under heavy clamping force. The flat head sits flush and the hex drive made installation a breeze without stripping.

The thermal black oxide finish is exactly what I needed for a precision assembly that sees daily shop use—it’s holding up without any surface rust after a week of handling. Threads cut clean into the jig plate, and all fifty screws came out of the box with consistent socket depth, which is more than

Installing these into a jig fixture, the flat head seated perfectly flush without any stripping—exactly what I needed for a clean assembly. The threads were clean and the hex drive grabbed tight on the first try.