1.1 This specification establishes the requirements for manganese bronze rod, bar and shapes produced in Copper Alloy UNS No. C67000 or C67500. 1.2 This specification is the companion to SI-Metric Specification B138M; therefore no SI equivalents are shown. 1.3 Warning-Mercury is a definite health hazard in use and disposal (Section 9). Note 1-Product suitable for hot forging applications is available under Specification B124.