M4-0.7×14mm 소켓 캡 나사 | 플랫 헤드 육각 소켓 드라이브 | 전체 나사산 | 클래스 12.9 합금강 열처리 블랙 옥사이드 (900개/팩)

The black oxide finish on these M4s has held up through constant use in my jigs—no rusting, no smearing on the threads. They seat cleanly with a hex wrench and the 12.9 alloy steel gives me confidence they’ll handle the torque without stripping.

The hex socket drive on these M4s is spot on—no stripping, even when I’m torquing them into steel fixtures. The black oxide finish has held up nicely through a week of assembly work, and at 900 per pack, I won’t be running out anytime soon.

I needed a bunch of M4 screws for a jig I’m building, and these 14mm ones fit perfectly into the threaded holes with no binding. The hex drive took my torque driver without any stripping, and the consistent Class 12.9 hardness gives me confidence they won’t snap under load.