1.1/2" x 12 UNF Nogo Thread Ring Gauge, Right-Hand, ANSI/ASME B1.1/B1.2, Hardened Gauge Steel - Metav IndustryLine

Take advantage of precise, standards‑compliant thread control together with robust, hardened construction for dependable pass/fail checks on the shop floor; order directly via Metav Werkzeuge or consult our team for application advice.

Thread ring gauge UNF NOGO, 1½" x 12, ANSI B1.1 / 2A — No‑Go ring gauge, Metav IndustryLine

The Thread ring gauge UNF NOGO, 1½" x 12, ANSI B1.1 / 2A is a precision No‑Go ring designed for rapid verification of external UNF threads in production and inspection environments

• Hardened gauge steel construction
• ANSI B1.1 / B1.2 standard compliant
• No‑Go ring for quick rejection
• 1½" UNF 12 tpi, right‑hand thread, 2A tolerance

Fast, reliable thread rejection on the shop floor

A No‑Go ring serves a single decisive purpose: to confirm that an external thread does not exceed its upper limits. The hardened construction and strict adherence to ANSI B1.1 ensure repeatable behaviour under frequent use, enabling a quick go/no‑go decision at any inspection station. Using a dedicated No‑Go ring reduces measurement time compared with full gauging or thread micrometres, which improves throughput while limiting the risk of shipping out-of-spec components.

Built for accuracy and long service life

Manufactured from hardened gauge steel, the ring is specified to the 2A external thread tolerance and the UNF form. The 12 tpi pitch is matched precisely to the nominal size 1½" UNF 12 tpi, and the ring is produced to ANSI/ASME B1.1/B1.2 requirements to guarantee compatibility with standard thread forms. The robust material choice and controlled hardening deliver wear resistance and dimensional stability, preserving measurement integrity over long production runs. The part’s compact mass (approx. 0.7 kg) makes it easy to handle and position without excessive fixture requirements.

Practical inspection workflow and handling

A No‑Go ring is used as part of a straightforward rejection test: when the ring fully enters the thread, the part fails inspection. That simple rule, combined with a clearly marked right‑hand thread, streamlines training and reduces operator uncertainty. For routine quality control, keep the gauge clean, store it in a protective case, and log usage intervals to maintain traceability. Integrating such a ring into regular sampling plans or final checks helps avoid downstream assembly issues and supports efficient corrective action when rejects occur.

Contact Metav Werkzeuge for procurement advice or to confirm suitability for specific production or inspection tasks — our specialists in Emmerich will assist with technical details and supply logistics.

Technical data

• Article number (SKU): M315.995.F
• GTIN: 4054469181202
• Brand: Metav IndustryLine
• Type: No‑Go thread ring gauge

Facts

• Size: 1½"
• Thread: UNF
• Thread pitch: 12 tpi
• Tolerance class: 2A
• Weight: 0.7 kg
• Standard: ANSI/ASME B1.1/B1.2

Special features

• Material: gauge steel, hardened
• Thread direction: right‑hand
• Application: external thread inspection
• Category: Gauges / Thread gauges

FAQ

How is a No‑Go ring used in a production check?
A No‑Go ring gauge is pushed onto the external thread; if the ring fully engages, the part fails. The Thread ring gauge UNF NOGO, 1½" x 12, ANSI B1.1 / 2A is intended specifically for this rejection test on 1½" UNF parts.

What does tolerance class 2A indicate for this ring?
Tolerance class 2A denotes the external thread tolerance band for standard UNC/UNF threads per ANSI; the gauge is manufactured to match that external class for reliable pass/fail assessment.

Is the gauge hardened and suitable for frequent use?
Yes — the ring is made from hardened gauge steel, offering wear resistance appropriate for regular shop‑floor inspection.

Can this ring be used for left‑hand threads?
No — this item is a right‑hand thread No‑Go ring and must not be used for left‑hand thread checks.

Does the gauge comply with recognised standards?
The ring is produced to ANSI/ASME B1.1/B1.2, ensuring compatibility with standard UNF thread geometry and industry inspection practices.

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