Plug Ring and Thread Gages – GSG Plug, Ring & Thread Gages

Explore Glastonbury Southern Gage fixed-limit gages for fast, repeatable verification of diameters, threads and other manufactured features.

Fixed-Limit Gages for Fast Part Verification

Plug, ring and thread gages provide a straightforward way to confirm whether manufactured features fall within specified limits. Rather than displaying a numerical measurement, GO and NO-GO members give operators a repeatable pass-or-fail check that works well for production inspection, incoming inspection and quality-control routines. This speeds routine verification while keeping the acceptance method clear for operators.

Plain plug gages are commonly used for internal diameters, while plain ring gages check external diameters. Thread plug gages inspect internally threaded features, and thread ring gages are used for externally threaded parts. Glastonbury Southern Gage offers multiple styles and configurations to address different sizes, tolerances and inspection conditions.

Selecting the Correct Gage

Accurate selection starts with the feature type, nominal size, tolerance or thread designation and the applicable drawing or standard. Material and wear considerations also matter, especially when a gage will be used frequently in a production environment.

• Reversible, taperlock and trilock plug styles address different size ranges and handling needs.
• Thread plug gages check internally threaded features.
• Thread ring gages check external threads and are available in solid or adjustable configurations.
• Set plugs are used to set and monitor adjustable thread ring gages.

Gage Selection and Calibration Support

Florida Metrology can help review your drawing requirements and identify an appropriate GSG gage configuration. Proper care and scheduled verification are also important because wear can affect a fixed-limit gage over time. Learn about our calibration services, browse additional precision measuring tools, or contact FA Metrology to request information and pricing.