Best Plain Plug Gauge (Steel & Carbide) manufacturer in Sonipat A plain plug gauge is a precision tool used to measure the inner diameter of holes or cylinders. It’s a straightforward but essential instrument in machining and manufacturing for ensuring that parts meet specified tolerances. Here’s a basic rundown of how it works and what you need to know: Description and Use: Structure: A plain plug gauge typically has a cylindrical shape with a set of precisely ground measuring surfaces. It’s often made from high-quality steel or other durable materials to ensure accuracy and longevity. Applications: Used in quality control and precision engineering to ensure parts meet required specifications for proper assembly and function. Maintenance: Regular calibration and proper storage are essential to maintain accuracy and longevity. Using a plain plug gauge is a simple yet effective way to check the inner diameter of holes, ensuring that components fit together as intended. Swaroop Autotechnologies Manufactures plug gauges in both steel and carbide on a regular basis.