Metric machine screws, Phillips pan head, Coarse (standard) thread

Also known as A-2 stainless, 18-8 is the most common grade of stainless steel for general use.

Also known as A-4 stainless, 316 is a highly corrosion resistant grade of stainless steel. Ideal in salt water and chlorine environments.

A general purpose nylon often used in fasteners for corrosion resistance.