Our Class X Pin Sets & Libraries offer the same “features” as our Class Z pin gages but with .00004” tolerance limit and .00002” roundness limit (note tolerance limits increase above .8250″ per gage makers tolerance chart). These pin gage sets are perfect for critical inspection needs or when you want to maximize your GO/NOGO tolerance limits. They’re also a great way to calibrate measuring equipment, micrometers and calipers. The Class X Pin Sets & Libraries are designed to provide precision and accuracy in various industrial applications. With their high-precision tolerance limits, they ensure that even the smallest deviations are detected, making them ideal for quality control inspections, product verification, and research and development. The sets are available in a range of sizes, making them suitable for a wide range of industries, including aerospace, automotive, and medical device manufacturing. In addition to their precision, our Class X Pin Sets & Libraries are also durable and long-lasting, reducing the need for frequent replacements and minimizing downtime. The pins are made from high-quality materials, ensuring that they withstand the rigors of repeated use and handling. By investing in our Class X Pin Sets & Libraries, you can rest assured that your products meet the highest standards of quality and precision.


All gages and sets are traceable to N.I.S.T. Boxes and pin gages both marked with size and serial number laser etched on each piece (M-OX not etched). The high-quality material used is 52100 Bearing Steel, ensuring durability and longevity. Additionally, all gages are designed with safety in mind, featuring no sharp edges. Every member is 2” long, providing a comfortable and convenient size for use.