This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.This specification covers glass-cloth-reinforced polytetrafluoroethylene (PTFE) resin in the form of sheet. This sheet has been used typically for electrical, electronic, and mechanical applications requiring a composite having the high strength and nondeforming characteristics of woven glass cloth and the electrical, chemical, and heat resistance and the anti-stick and low- friction properties of PTFE resin, but usage is not limited to such applications.