ASTM D953 is a test method that covers the determination of the pin - bearing strength of it rigid plastics either in sheet form, molded the form, or in reinforced thermoset form. The Procedures of a and B are applicable for thermoplastic materials in recogniton loading and compression will loading respectively. The Procedure C is applicable for thermoset reinforced plastics.
Before conducting ASTM D953, it is important to read the - specification. The Standards can be obtained from the appropriate standard authorities.