M4-0.7 x 8mm 소켓 캡 나사 | 낮은 육각 소켓 드라이브 | 풀 나사산 | 클래스 10.9 합금강 열처리 블랙 옥사이드 (400개/팩)

Used a handful of these in a precision drill jig I’m building, and the low-profile head was a lifesaver in tight clearance areas. The black oxide finish feels sturdy and resistant to corrosion.

Finally got these to finish a jig I've been putting off, and the black oxide finish feels way more durable than the zinc-plated stuff I usually grab. The low head profile let me fit the screw flush where a standard cap would have stuck out.

Used a handful to replace stripped screws on a jig at work, and the low-profile heads sit flush without interfering with moving parts. The black oxide finish hasn't shown any wear after a week of daily use. These are exactly what I needed for tight spots.