Rationale

A962/A962M section 14 specifies decarburization / carburization test that applies to both external and internal threads. It refers to test method F2328/F2328M and specifies decarb shall not exceed the class 3 limits in F2328/F2328M. The class 3 limits apply to external threads. The class 4 limits apply to internally threaded products. This ballot is to add the class 4 limits for nuts.