The metric thumb screw MTOP (similar to DIN 316) are manufactured in various engineering materials that favor properties such as chemical, mechanical, oxidation resistance, etc. They are available in PA66 -Polyamide (Nylon) -, PP -Polypropylene-, POM -Acetal Resin-, PVDF -Polyvinylidene Fluoride-, PEEK -Polyetheretherketone- and PAGF -Nylon with the possibility of up to 50% glass fiber-.