M8-1.25 × 15mm 소켓 캡 나사 | 육각 드라이브 | 풀 스레드 | 클래스 12.9 합금강 열 블랙 옥사이드 (200/팩)

Fitted these into a precision fixture build and the black oxide finish held up perfectly against minor abrasion during assembly. The hex socket drive seated cleanly with no stripping, which I appreciate for repeated adjustments. Class 12.9 strength gives me confidence they won't fatigue under load.

I needed bolts that could handle the stress of a jig assembly, and these Class 12.9 cap screws fit perfectly without stripping. The hex socket drive made tightening them in tight spots much easier than I expected.

The black oxide finish on these M8 screws looks really clean and professional, and they threaded perfectly into my jig setup without any binding. For 200 pieces at this price, the consistent quality of the alloy steel is impressive.