ACETAL POLYOXYMETHYLENE Acetal plastic is an engineering thermoplastic. It is often used to make a variety of custom parts as well as acetal plastic screws, hex bolts, hex nuts as well as other parts. Polyoxymethylene or POM is another name for Acetal. POM is used in precision parts that require high stiffness, low friction, and dimensional stability. POM is known for its high strength when exposed to temperatures from -40