Hex Nut, M16-2, Titanium, Grade 2 They are completely corrosion free, even in saltwater. Common uses include fastening furniture together where rust staining is an issue, car and boat engines so you won't bu.
Grade 5, 5/16"-18 Structural Bolt, Titanium, 1-1/2 in L Grade 5 titanium is a common aerospace alloy that has been used in commercial aircraft for decades. The bolts have a dimple in the top of the head that designates high strength and a bui.