1 1/8" UNC Thread Go Gauge 7 TPI, Hardened Go/No-Go Master, ANSI B1.1/B1.2 - Metav IndustryLine

High conformity with ANSI/ASME standards and a hardened gauge-steel body ensure repeatable go/no-go verification of UNC internal threads; the tolerance 2B and 7 TPI specification provide the right fit for standard assemblies. Order the gauge directly via Metav Werkzeuge or consult their specialists for application advice.

Thread plug gauge UNC 1 1/8" x 7 (ANSI/ASME B1.1) — Metav IndustryLine

The Thread plug gauge UNC 1 1/8" x 7 (ANSI/ASME B1.1 / 2B) is a precision go/no-go gauge intended for verifying internal UNC threads in production and inspection environments.

• Hardened gauge steel construction
• ANSI/ASME B1.1 thread form compliance
• Tolerance class 2B for standard internal fit

Repeatable conformity for production control

A production-ready go/no-go gauge simplifies pass/fail decisions on internal UNC threads by embodying the official thread form and tolerance. Conformity with ANSI/ASME B1.1 ensures compatibility with established fastener systems, while the specified 2B tolerance denotes the standard internal fit commonly required in mechanical assemblies. The clear definition of 1 1/8" size and 7 TPI (threads per inch) reduces ambiguity in procurement and inspection procedures, enabling streamlined quality checks and fewer assembly reworks.

Durable construction that reduces downtime

Manufactured from hardened gauge steel, the tool resists wear across repetitive inspections, which supports consistent measurement over time. The compact mass (approx. 0.45 kg) and robust material mean the gauge maintains its geometric integrity under typical workshop handling; fewer replacements are required, reducing process interruptions. The solid construction also minimises the risk of false rejects caused by tool deformation, contributing to a more reliable production flow and measurable cost-savings through reduced scrap.

Practical inspection routine and clear interpretation

The gauge serves as a direct functional control: the "go" end must enter the internal thread without force while the "no-go" end must not fully engage when the thread falls outside tolerance, offering an unambiguous verdict for operators. The 2B class indicates the internal thread tolerance for standard commercial assemblies, balancing ease of assembly with acceptable clearance. Using a master gauge in incoming inspection or final audit stabilises acceptance criteria and documents process capability when combined with regular gauge checks.

Reliability backed by a precision partner

Sourcing this measurement tool from an established range like Metav IndustryLine links the physical gauge to a wider quality assurance strategy. Metav’s focus on accessible precision and broad product availability supports uninterrupted supply to workshops and production lines. Clear technical conformity, combined with durable construction, makes the gauge a pragmatic choice for manufacturers seeking consistent thread verification during assembly, maintenance or incoming inspection.

Contact Metav Werkzeuge today to secure Metav IndustryLine thread plug gauges compliant with ANSI/ASME standards and to discuss suitable inspection strategies for your production environment

Technical data

• Article number: M315.931
• GTIN: 4054469179803
• Label: Gewinde-Lehrdorn UNC, 1.1/8 x 7 ANSI B1.1 / 2B

Facts

• Weight: 0.45 kg
• Size: 1 1/8"
• Thread pitch: 7 TPI
• Tolerance class: 2B
• Tariff number: 90173000

Special features

• Material: hardened gauge steel
• Standard: ANSI/ASME B1.1/B1.2
• Category: measurement gauges

FAQ

What is the primary purpose of this plug gauge?
The thread plug gauge M315.931 is used for go/no-go verification of internal UNC threads to confirm conformance with ANSI/ASME B1.1 and the 2B tolerance.

What does tolerance class 2B mean for internal threads?
Tolerance class 2B denotes a standard internal thread fit that balances assembly ease and strength; the gauge verifies that the internal thread meets that specified clearance.

How are the size and pitch specified on the gauge?
The gauge is specified as 1 1/8" with 7 TPI (threads per inch), matching common UNC sizing conventions for straightforward identification and use.

How should the gauge be maintained to ensure accuracy?
Routine inspection for wear and careful storage of the plug gauge will preserve the hardened surface; periodic comparison with a master reference ensures continued traceability.

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