M3-0.5 x 20mm 육각 머리 나사 | 316 스테인리스 스틸 | 풀 스레드 (500개/팩)

Used these to replace the factory hardware on my milling machine’s vise and they seated perfectly with a socket driver—no stripped heads, even after torquing them down. The 316 stainless finish feels solid and hasn’t shown any rust after a week of coolant exposure. For 500 pieces at this price, it’s

I’ve been using these to mount brackets on a marine project, and the 316 stainless hasn’t shown any rust after weeks in damp conditions. The fully threaded design made it easy to get a secure grip in tight spots.

The hex heads grab a socket wrench perfectly, no stripping even when I torqued them down on a steel bracket. All 500 came in the box clean and fully threaded, so I didn't have to chase a single one with a die.