The use of American standard X ring

The X ring of the American standard usually refers to the star mark logo developed by ASTM (American Society for Testing and Materials), which is used to identify the grade, performance level and special requirements of the material.

 

The number, filling and arrangement of the X ring represent different meanings, and the size of the star represents different standards and norms. There is usually a letter in the center of the X, which is used to denote a specific characteristic of a material or product.

 

The use of X ring can help users choose the material or product that suits their needs, ensuring that it meets the required quality standards and performance requirements. At the same time, the X ring can also make the identification and classification of materials or products more convenient.

 

For example, in the thread specification, the X ring is used to indicate the thread form, thread type and thread geometric characteristics to ensure that the thread meets the requirements and meets the installation and connection requirements.