When you need to ensure that your threaded components are within specifications, the Vermont Gage 362120030 Adj. Thread Ring Gauge is the tool for the job. The ring gauge can be used to check M8 x 1.00 threads in metalworking applications. This product features a go/no go design with six graduations and thread size of M8 x 1.00. The gauge has a pitch diameter of 7.324 mm, 7.212 mm. It comes with an included certificate of accuracy with NIST traceability and is made from tool steel material. If you need to ensure that your threaded components are within specifications, use this Vermon Gage 362120030 Adj Thread Ring Gauge to get the job done right.