1 1/8" UNF Thread Plug Gauge 12 TPI Right-Hand Hardened Gauge Steel ANSI B1.1/B1.2 - Metav IndustryLine

The combination of hardened gauge steel, adherence to ANSI/ASME B1.1/B1.2, and a precise 2B tolerance class ensures reliable thread verification and longer service life; order the thread plug gauge directly via Metav Werkzeuge or consult the technical team for application advice.

Thread plug gauge 1 1/8″-12 UNF (ANSI/ASME B1.1) — 2B, hardened gauge steel (Metav IndustryLine)

A thread plug gauge 1 1/8″-12 UNF designed for rapid, repeatable inspection of internal UNF threads in production and quality control environments

• Hardened gauge steel construction
• ANSI/ASME B1.1/B1.2 compliant
• Tolerance class 2B, right-hand thread

Consistent thread acceptance with minimal downtime

Engineered for routine inspection, this thread plug gauge combines a hardened construction with standardised geometry to deliver fast go/no‑go checks on internal threads. Compliance with ANSI/ASME B1.1 guarantees that the thread form and pitch are assessed against an established reference, which reduces the risk of ambiguous results at incoming inspection or on the shop floor. The 2B classification denotes the internal thread tolerance band as defined in the ANSI standard, offering a reliable acceptance criterion for typical production runs without the need for complex measuring devices.

Practical integration into quality workflows

The robust build and familiar handling characteristics permit straightforward incorporation into standardised inspection steps. Operators and inspectors benefit from the simple tactile decision—acceptable or reject—provided by the gauge’s fit, which speeds throughput and reduces measurement variability compared with ad hoc visual checks. The right‑hand thread and the 1 1/8″-12 UNF pitch match common fastener specifications in mechanical assemblies and ensure direct applicability where that thread form is specified. Lightweight handling combined with a compact footprint supports repeated use across bench and assembly stations.

Durability, traceability and long service life

Manufactured from hardened gauge steel, the gauge resists wear during repeated engagement and retains thread form integrity over many cycles, preserving the original acceptance limits. The solid construction minimises the need for frequent replacement and helps maintain process capability across batches. For traceability and inventory control, the item is supplied with a clear article identifier and GTIN to integrate into quality records and procurement systems; this supports audit trails and simplifies stock management in larger operations.

For reliable thread verification of UNF internal threads, request the Metav IndustryLine 1 1/8″-12 UNF thread plug gauge through Metav Werkzeuge or consult the Emmerich technical advisers for fitment guidance and application notes

Technical data

• Article number: M315.931.F
• GTIN: 4054469179827
• Label: Thread plug gauge 1 1/8″-12 UNF / 2B

Facts

• Thread size: 1 1/8″
• Pitch: 12 tpi
• Tolerance class: 2B
• Weight: 0.45 kg
• Standard: ANSI/ASME B1.1/B1.2

Special features

• Material: hardened gauge steel
• Thread direction: right-hand thread
• Category: gauges, inspection pins

FAQ

What does the 2B tolerance class indicate for this gauge?
The 2B designation refers to the internal thread tolerance band as defined in ANSI/ASME B1.1 and is appropriate for standard fitment and assembly checks using the thread plug gauge M315.931.F.

Can this gauge be used for external thread inspection?
No, this item is a thread plug gauge intended for internal thread verification of UNF threads rather than external thread measurement.

Is the gauge compatible with metric threads or other UN forms?
This gauge is manufactured specifically for the 1 1/8″-12 UNF thread form; other thread systems or sizes require the corresponding gauge made to the relevant standard.

What material is the gauge made from and why is that important?
The gauge is produced from hardened gauge steel, which preserves the thread form under repeated use and contributes to stable acceptance criteria over a long service life.

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