1 1/8" UNEF Thread Plug Gauge 18 TPI, Right-Hand, Hardened Gauge Steel, ANSI/ASME B1.1 2B - Metav IndustryLine

Take advantage of the ANSI/ASME B1.1 compliance, hardened gauge steel construction and clear 2B tolerance to ensure repeatable internal thread inspection; order the gauge directly via Metav Werkzeuge or contact our technical consultants for application advice.

Thread plug gauge UNEF, 1 1/8" x 18 tpi (ANSI/ASME B1.1) — 2B tolerance, hardened gauge steel

The Thread plug gauge UNEF, 1 1/8" x 18 tpi is a precision go/no‑go inspection gauge for verifying internal UNEF threads to ANSI/ASME standards in production and quality control environments

• UNEF 1 1/8" x 18 tpi — ANSI/ASME B1.1 compliant
• Hardened gauge steel for durable inspection
• Tolerance class 2B for standard internal threads

Reliable thread verification for quality control

The gauge functions as a straightforward go/no‑go check that removes ambiguity during inspection. Conformance to ANSI/ASME B1.1 ensures the thread form and pitch are measured against an established benchmark, while the 2B tolerance designates the standard internal thread class typically required in general engineering and assembly work. This combination provides a measurable basis for acceptance decisions and facilitates consistent quality gates on the production line.

Built to last for busy inspection benches

Manufactured from hardened gauge steel, the tool resists wear under frequent use and maintains dimensional integrity over time. The robust material choice reduces the need for frequent replacement, which in turn lowers downtime and the cost of repetitive purchases. A right‑hand thread form is provided for straightforward compatibility with common external threads, delivering a durable inspection tool for repetitive go/no‑go checks in workshops and inspection labs.

Practical benefits for production and workshop workflows

Using a standardised thread gauge accelerates routine checks after tapping, during incoming inspection of components, and as a final assembly control. By making acceptance criteria explicit — “go” for conformance, “no‑go” for rejection — the gauge speeds decisions on the shop floor, reduces rework and minimises scrap rates. The clear numeric designation (1 1/8" x 18 tpi) and conformity to the ANSI/ASME norm make integration into existing inspection procedures straightforward and traceable.

Handling, traceability and interoperability

The compact form and modest mass support easy handling at the inspection bench, and identification data such as SKU and GTIN enable rapid inventory control and traceability in quality records. The tool is suited to standard inspection routines where reliable pass/fail assessment of internal threads is required. For tailored measurement strategies or batch control procedures, the gauge can be referenced alongside inspection logs to document conformity and support process audits.

For specification sheets, batch availability or application guidance, contact Metav Werkzeuge — our technicians at info@metav-werkzeuge.com or +49 2822 7131930 provide detailed advice and can assist with ordering the appropriate inspection tools for specific production needs

Technical data

• Article number: M315.931.EF
• GTIN: 4054469179810
• Weight: 0.45 kg
• Size / nominal diameter: 1 1/8"
• Thread pitch: 18 tpi
• Tolerance class: 2B
• Tariff number: 90173000

Facts

• Standard: ANSI/ASME B1.1/B1.2
• Material: hardened gauge steel
• Special feature: right‑hand thread
• Category: Lehren; Messstifte

Special features

• Go/no‑go inspection function
• Durable, wear‑resistant material
• Suitable for production and workshop inspection
• Clear identification for traceability

FAQ

What does tolerance class 2B mean for this gauge?
Tolerance class 2B denotes the standard internal thread class under ANSI/ASME; the Thread plug gauge UNEF, 1 1/8" x 18 tpi (SKU M315.931.EF) verifies that the internal thread falls within this commonly specified tolerance band.

Is this gauge suitable for left‑hand threads?
No — the gauge is manufactured as a right‑hand thread. For left‑hand thread inspection a corresponding left‑hand gauge would be required.

What material is the gauge made from and why does it matter?
The gauge is made from hardened gauge steel, which provides wear resistance and long service life so dimensional stability is maintained across repeated inspections.

Which standard does the gauge conform to?
This plug gauge conforms to ANSI/ASME B1.1 (UN/UNEF thread forms) and related B1.2 references, ensuring compatibility with common North American thread specifications.

How is the go/no‑go function interpreted in routine checks?
The “go” end should enter and engage where specified for an acceptable thread; the “no‑go” end must not fully engage if the thread meets tolerance. This clear pass/fail criterion simplifies decision making at the inspection bench.

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