本规范涵盖了用于航空和航天应用的成型环、压缩密封件、o形圈线和成型就地垫圈形式的丁基橡胶。因为AMS3238不再适用于O形圈。对于O型环，如果规定了AMS3238，则应满足AMS7338的要求。

This specification covers a butyl rubber in the form of molded rings, compression seals, o-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. As AMS3238 is no longer valid for O-rings. For O-rings, the requirements of AMS7338 shall be met wherever AMS3238 is specified.