Q: I need a fastener that is very low weight and offers good wear resistance for a robotics application. I need about 40 ksi in strength.

A: For your application I would actually suggest an engineered polymer fasteners since your strength requirement isn’t high enough to necessitate a metal . PEEK Extreme screws are made of a carbon fiber reinforced PEEK polymer. These screws provide one the highest tensile strengths of any polymer, with an ultimate tensile greater than 47 ksi. In addition, PEEK screws are very lightweight, far lighter than any metal fastener and will provide excellent wear resistance.