M10-1.5 x 25mm 內六角螺絲 | 平頭內六角驅動 | 全牙 | 316不鏽鋼 (100 / 包)

For a boat railing repair, the 316 stainless held up perfectly in saltwater spray after a month—no rust at all. The hex drive seated firmly without stripping even with a high-torque wrench.

I’ve been using these screws for a jig fixture I’m building, and the 316 stainless steel feels significantly more corrosion-resistant than the 304 stuff I used before. The flat head sits perfectly flush in the countersunk holes, which really makes the assembly look clean and professional.

Finally, a bolt pack that isn't full of rusted duds—the 316 stainless finish on these feels properly marine-grade. The hex socket drive seated perfectly with my Allen key, no stripping on the first few I've torqued down for a jig build.