A Class 150 NPT cap refers to a type of pipe fitting that is designed to cap or seal the end of a pipe or fitting with National Pipe Thread (NPT) threading and a pressure rating of Class 150. A rim air pipe cap is used to cover the valve stem of the rim air pipe when the tire is properly inflated and does not require further air pressure adjustment. This cap or plug helps to protect the valve stem from dirt, debris, and moisture, preventing potential damage or leaks.Attributes:• Conform to ASME B16.3.• Cap material is durable, resistant to environmental factors, and capable of providing an airtight seal.• Secure fastening methods that facilitate quick and convenient installation and removal.Applications: A Class 150 NPT cap is designed to fit securely over the valve stem and provide an airtight seal.