A. We need a screw that is usable at 200C in air only, so no chemical resistance needed. I like the high strength of the Carbon Fiber PEKK or PEEK Extreme. Will these work?A
Q: Would recommend using either Glass filled PEEK or Vespel. Vespel screws are made from the highest temperature polymer available. Vespel has a usable limit of 300°C (572°F) in continuous heat and 500°C (932°F) intermittent.
Q: I’m working with a process that requires a constant operating temperature of 450F. Do I need to use a metal screw or is there a polymer that can handle this?
A: There are definitely polymers that can handle an environment of 450F. One option is a PEEK fastener. PEEK screws retains its strength to 500F. It is also thermal degradation resistant, meaning that it is resistant to chemical decomposition caused by heat. If you need more heat resistance you could look at Vespel screws. Vespel screw are the best for high temperature heat resistance and will be able to withstand temperatures up to 570F (300C). However keep in mind Vespel screws are very expensive compared to PEEK.