The VERMONT GAGE 361115030 Adj. No Go Ring Gage is a no-go gage that allows you to inspect externally threaded parts for maximum pitch diameter. It has a Class 2A thread size of #6-32 UNC and thread type of UNC. This ring gage comes with an included certificate of accuracy with NIST traceability, which ensures the quality of the product. The tool steel material is sturdy and durable, so you can rely on it to last long in your workshop or job site. The VERMONT GAGE Threaded Ring Gauge will help you ensure precision when working with threaded parts.