M3-0.5 x 20mm 소켓 캡 나사 | 버튼 헤드 육각 소켓 드라이브 | 전체 나사산 | 316 스테인리스 스틸 (800개/팩)

The hex socket drive on these M3 screws gives a solid grip without stripping, and the 316 stainless feels tougher than the usual 304 stuff. Used a handful for mounting brackets on a CNC jig, and they threaded smoothly into the tapped holes. For the quantity in the package, it's a fair deal for preci

I needed fasteners for a jig assembly and these M3-0.5 x 20mm screws fit perfectly. The 316 stainless steel feels much more corrosion-resistant than the usual 304 I've used before.

I’ve been using these for small robotics jigs and the hex socket drive makes them easy to tighten with a standard driver. The 316 stainless steel feels solid and hasn’t shown any rust after a few weeks in a slightly damp workshop.