No. 12 x 28 Thread Go/No-Go Ring Gauge UNF Right-Hand, ANSI/ASME B1.1 2A - Metav IndustryLine

Take advantage of secure, standards‑based thread control combined with durable, hardened construction for reliable pass/fail inspections on production lines. The compact design and clear No‑Go function reduce rework and help maintain throughput — order the gauge via Metav Werkzeuge or consult our specialists for application guidance.

Thread ring gauge UNF No. 12‑28 (No‑Go) — hardened gauge steel, ANSI/ASME B1.1

The Thread ring gauge UNF No. 12 × 28 NOGO is a compact, purpose‑built inspection gauge for rapid verification of external UNF threads in workshop and production environments.

• ANSI/ASME B1.1/B1.2 compliant
• No‑Go function for quick rejection
• Hardened gauge steel construction
• No. 12‑28 UNF, tolerance class 2A

Ensure fast, unambiguous acceptance decisions on the line

This No‑Go thread ring serves as a practical, binary inspection tool that eliminates ambiguity during routine checks. By providing a definitive pass/reject result, the gauge streamlines quality control and shortens inspection cycles; the No‑Go design prevents marginal parts from proceeding, thereby lowering the risk of field failures and costly rework. The emphasis on repeatable go/no‑go criteria supports tighter process control and predictable throughput.

Built for repeatable use and workshop resilience

Constructed from hardened gauge steel, the ring is dimensionally stable and resists wear during repeated engagement with external threads. The material choice preserves the inspection edge and extends service life under normal workshop conditions. The right‑hand thread orientation is specified for compatibility with conventional UNF external threads, and the compact geometry eases handling at inspection stations or on the shop floor, supporting uninterrupted production routines.

Standards alignment and clear technical scope for auditors

Designed to the ANSI/ASME B1.1 thread form and marked with tolerance class 2A, the gauge matches common engineering expectations for UNF fasteners. The No. 12‑28 pitch (28 tpi) is identified on the item for traceability and audit purposes. As a dedicated No‑Go ring, it verifies that external threads do not exceed the maximum material condition allowed by the mating standard. Identification details such as M315.979.F and the GTIN are provided for inventory control and easy replacement ordering.

Contact Metav Werkzeuge today to confirm suitability for specific production requirements and to secure fast delivery from our Emmerich warehouse — call +49 2822 7131930 or email info@metav-werkzeuge.com

Technical data

• Article number: M315.979.F
• GTIN: 4054469180786
• Label: Gewinde‑Lehrring UNF NOGO, Nr. 12 x 28 ANSI B1.1 / 2A
• Norm: ANSI/ASME B1.1/B1.2

Facts

• Size designation: No. 12
• Threads: 28 tpi
• Tolerance class: 2A
• Weight: 0.1 kg
• Tariff number: 90173000
• ECLASS: 21170214

Special features

• Material: hardened gauge steel
• Function: No‑Go thread ring gauge (external thread rejection)
• Thread direction: right‑hand thread
• Category: gauges / thread gauges

FAQ

What does "No‑Go" mean for this thread ring gauge?
The No‑Go designation indicates the ring is intended to detect threads that exceed the maximum allowable dimensions; the ring must not fit a compliant external thread.

Which thread standard does the gauge follow?
This gauge is manufactured to ANSI/ASME B1.1 and is specified for UNF No. 12‑28 threads with tolerance class 2A.

Is the gauge suitable for checking external UNF threads on fasteners?
Yes — the tool is a dedicated external thread inspection ring designed for UNF No. 12 × 28 external threads.

What material is the gauge made from and why?
The ring is made from hardened gauge steel to ensure wear resistance and dimensional stability during repeated inspections.

How is the item identified for ordering or inventory?
Identification data include the article number M315.979.F and GTIN 4054469180786 for procurement and stock control.

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