M6-1 x 40mm 機械螺絲 | 盤頭十字驅動 | 316不鏽鋼（100入/包）

Installed these on my boat's deck railing last weekend, and they fit perfectly in the pre-tapped holes without any binding. The 316 stainless is a clear step up from the old 304s I used before—no rust spots after a saltwater splash.

Used a handful of these to replace corroded fasteners on my boat’s railing, and the 316 stainless held up perfectly through a weekend in saltwater. The pan head sits flush and the Phillips drive grabbed nicely without stripping.

Installed these on a dock gate last month, and they haven't shown a speck of rust despite constant salt spray. The 316 stainless steel is clearly the real deal, and the Phillips drive seated perfectly without stripping. Exactly what I needed for a marine environment.