No. 12 x 24 Thread Master Gauge UNC, ANSI B1.1 2B, Hardened Gauge Steel - Metav IndustryLine

Take advantage of a standards-compliant inspection solution that combines ANSI/ASME conformity, hardened gauge steel construction, and the correct pitch for reliable thread checks; order the gauge directly via Metav Werkzeuge or consult our specialists for application advice.

Thread plug gauge UNC No. 12 x 24 — internal thread inspection gauge (Metav IndustryLine)

The Thread plug gauge UNC No. 12 x 24 is a compact inspection tool for verifying internal UNC threads in production and quality control environments.

• Hardened gauge steel construction
• ANSI/ASME B1.1/B1.2 compliant
• Thread size No. 12 x 24 UNC
• Tolerance class 2B for internal threads

Reliable verification of internal thread geometry

A dedicated thread plug gauge provides a fast, objective check of internal thread conformity to specification. By combining the nominal size No. 12 x 24 UNC with the defined 24 tpi pitch and 2B tolerance, the gauge confirms whether a tapped hole meets the dimensional envelope required by ANSI/ASME B1.1/B1.2. This reduces ambiguity in inspection reports, speeds up pass/fail decisions on the shop floor and cuts rework. The straightforward function of the gauge makes it suitable for repeat checks in small-batch production as well as routine quality control.

Built for workshop durability and repeat use

Constructed from hardened gauge steel, the tool resists wear during repeated engagement with test pieces and maintains its functional form over long inspection cycles. The compact, lightweight design simplifies handling and storage while retaining the stiffness necessary for accurate insertion and withdrawal. A robust material choice and careful hardening process mean the gauge sustains a consistent fit, preserving the verified thread boundary and ensuring reproducible results across many inspection cycles.

Standards-based control that improves interchangeability

Using a gauge manufactured to recognised standards ensures compatible mating parts and reliable assembly performance. The 2B tolerance designation identifies the internal thread class and sets clear limits for thread form and fit; compliance with ANSI/ASME B1.1/B1.2 ensures the mating external threads produced to the corresponding class will assemble without excessive play or interference. Integrating standards-compliant gauging into inspection routines reduces downstream quality risks and supports traceable production control.

Efficient integration into inspection workflows

The simple, purpose-driven design makes the plug gauge ideal for rapid checks during set-up, in-process inspection and final acceptance. The gauge’s clear specification—size, pitch and tolerance—facilitates documentation and traceability in quality records. For operations seeking to streamline inspection without complex measurement equipment, this gauge offers a pragmatic balance of speed and precision, fitting readily into inspection kits or tool drawers and enabling technicians to confirm thread quality in seconds.

Contact Metav Werkzeuge for tailored guidance on the UNC No. 12 x 24 plug gauge and to request availability; reach our Emmerich team at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• SKU: M315.919
• GTIN: 4054469179483
• Nominal size: No. 12
• Pitch: 24 tpi
• Tolerance class: 2B
• Material: Hardened gauge steel
• Standard: ANSI/ASME B1.1/B1.2
• Weight: 0.1 kg
• eClass: 21170214

Facts

• Pitch (measurable): 24 threads per inch
• Weight (measurable): 0.1 kg
• Nominal size (measurable): No. 12
• GTIN (measurable): 4054469179483
• Tolerance class (measurable): 2B

Special features

• Hardened gauge steel construction
• Designed for internal thread verification
• Conforms to ANSI/ASME B1.1/B1.2
• Compact inspection gauge for production use

FAQ

What is this gauge used for?
The gauge is used to verify internal UNC threads to the specified No. 12 x 24 and 2B tolerance, confirming conformity with ANSI/ASME B1.1/B1.2.

Is the material suitable for routine shop use?
Yes, the hardened gauge steel construction of this plug gauge is chosen for wear resistance and suitability for repeated insertion during standard inspection routines.

Which thread tolerance does the tool represent?
The tool represents the 2B tolerance class for internal threads, indicating the acceptable dimensional envelope for the inspected hole.

Does the gauge indicate pitch as well as size?
The plug gauge matches the nominal size No. 12 x 24 UNC, which includes the 24 tpi specification for pitch conformity.

Which standard does this gauge comply with?
This inspection tool complies with ANSI/ASME B1.1/B1.2, ensuring measurements align with widely recognised thread standards.

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