1.1 This specification covers the requirements for copper alloy strip for use in the manufacture of electrical connectors or spring contacts produced from one of the following Copper Alloy UNS Nos. C14530, C15100, C15500, C19400, C19500, C19700, C23000, C26000, C42200, C42500, C51000, C51100, C52100, C63800, C65400, C68800, C70250, C70260, C75200, and C76200.