2" UNC Go Thread Ring Gauge 2 × 4.5 Pitch ANSI/ASME B1.1 2A - Metav IndustryLine

Take advantage of precise thread acceptance and durable construction: the combination of ANSI/ASME B1.1 conformity, hardened gauge steel and a clear 2A tolerance class ensures reliable go/no-go checks and long service life. Order the gauge directly via Metav Werkzeuge or contact our consultants for application advice.

Thread ring gauge UNC GO, 2" x 4.5 TPI (ANSI/ASME B1.1) — Metav IndustryLine

A Thread ring gauge UNC GO, 2" x 4.5 TPI for fast verification of external UNC threads in workshop and production environments, designed to the ANSI/ASME B1.1 specification.

• Hardened gauge steel construction
• Conforms to ANSI/ASME B1.1/B1.2
• Tolerance class 2A acceptance
• GO ring for external thread verification

Reliable acceptance testing to international thread standards

This ring gauge is manufactured to the ANSI/ASME B1.1/B1.2 thread form and intended for GO checks against external UNC threads. As a GO gauge it confirms that a thread falls within the allowable maximum material condition for assembly; components that pass the GO test can be confidently assembled without interference. The explicit 2A tolerance class signals the gauge is matched to the common external thread allowance for class 2 fasteners, supporting interchangeability across suppliers and repeatable production acceptance.

Built for repetitive use and long-term stability

Made from hardened gauge steel, the ring gauge resists wear in high-usage inspection routines and retains thread geometry for many cycles, reducing the need for frequent replacement. The nominal size 2" and the thread pitch 4.5 TPI are clearly identified on the tool for rapid selection at the control station. Its robust construction and balanced mass help maintain concentric engagement during checks, which lowers measurement variation and contributes to consistent quality control in machining and assembly lines.

Seamless workflow integration and traceability

The ring gauge offers rapid, tactile GO/NO-GO assessment that integrates simply into shop-floor inspections and final inspection checks. Use the gauge to validate batches before assembly, to segregate non-conforming parts quickly, or to confirm corrective actions after tool adjustments. The compact handling and immediate pass/fail result reduce inspection time per part, increasing throughput while maintaining documented traceability through the product SKU and GTIN for inventory and quality records.

For assured thread acceptance from a trusted source, request the Metav IndustryLine GO ring gauge via Metav Werkzeuge — our Emmerich team can advise on inventory and technical fitment at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: M315.967
• GTIN: 4054469180588
• Label: Thread ring gauge UNC GO, 2" x 4.5 TPI
• Condition: Good

Facts

• Weight: 0.8 kg
• Size: 2"
• Pitch: 4.5 TPI
• Tolerance class: 2A

Features & materials

• Material: hardened gauge steel
• Standard: ANSI/ASME B1.1/B1.2
• Type: GO ring gauge
• Category: Gauges / Inspection tools

FAQ

What is the primary use of this gauge?
The thread ring gauge UNC GO, 2" x 4.5 TPI is used to verify external UNC threads quickly by confirming that the thread meets the GO acceptance condition specified in ANSI/ASME B1.1.

What does the 2A tolerance class indicate?
Tolerance class 2A denotes the commonly used external thread allowance for general-purpose fastening; the gauge is manufactured to that class to ensure compatibility with standard internal threads.

How is the GO ring gauge applied during inspection?
A component is considered acceptable if it screws onto the GO ring gauge freely without jamming; lack of fit indicates potential oversize or form error requiring rejection or rework.

How should wear be checked and when is replacement needed?
Inspect the ring for surface degradation or loss of thread form; if engagement becomes inconsistent or marks appear on the workpiece, replace the gauge or have it checked as part of the regular tool control cycle to maintain inspection reliability.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com