COVERAGEThis specification covers requirements on drill-stem members (except drill pipe)@ including threaded connections@ gauging practice@ and master gauges therefor. A typical drill-stem assembly is shown in Figure 1. Also included@ as appendices@ are recommended practices on care and use of regional master@ reference master@ and working gauges. MATERIAL REQUIREMENTS Where material requirements are not otherwise specified@ material for equipment supplied to this specification may vary depending on the application but shall comply with the manufacturer's written specifications. Manufacturer specifications shall define: a. Chemical composition limits. b. Heat treatment conditions. c. Mechanical property limits: 1. Tensile strength. 2. Yield strength. 3. Elongation. 4. Hardness.