M4-0.7 X 35mm 內六角螺絲 | 平頭內六角驅動 | 全螺紋 | 316不鏽鋼 (400顆/包)

Used a whole box of these mounting brackets for an outdoor railing job, the 316 stainless is holding up beautifully against the salt air. The flat head sits perfectly flush every time, which made for a clean finish I’m really happy with.

The hex socket drive sits deep and clean, so my Allen key grips perfectly every time without stripping. I’ve been using them to hold a jig together in a damp workshop and after a month not a single speck of rust, which is exactly what I needed from the 316 stainless.

Had one of the original bolts snap on a saltwater fishing rig, and these 316 stainless replacements are holding up perfectly with no corrosion after a month of heavy use. The hex drive is clean and hasn't stripped like cheaper ones I've tried.