Hex cap screws and hex bolts are available in various materials besides steel such as aluminum, brass, Monel, nylon, and silicon bronze. Aluminum is a lighter weight option from steel while brass is utilized for corrosive environments. Monel excels in highly corrosive settings and nylon is primarily used in applications that involve chemical exposure. This can be credited to its lightweight, non-magnetic, non-corrosive, non-toxic, non-flammable, and non-conductive attributes. Silicon bronze is a strong material that withstands extremely corrosive environments.