No. 3 48 TPI UNC Nogo Thread Ring Gauge, Hardened Gauge Steel, ANSI/ASME B1.1/B1.2 - Metav IndustryLine

Take advantage of standards compliance, hardened construction and a clear go/no‑go inspection principle for consistent thread acceptance. Order the gauge directly via Metav Werkzeuge or ask our consultants if needed.

Thread Ring Gauge UNC NOGO No. 3‑48 (ANSI/ASME B1.1, 2A) — Metav IndustryLine

The Thread Ring Gauge UNC NOGO No. 3‑48 is a dedicated no‑go ring for rapid verification of UNC external threads, designed for production inspection and quality control in machining and assembly.

• ANSI/ASME B1.1 compatible
• Hardened gauge steel construction
• Tolerance class 2A for external threads
• No‑go ring for UNC 3‑48 inspection

Precision that protects the process

The thread ring gauge provides an objective go/no‑go check that prevents oversize external threads entering assembly. Built to the ANSI/ASME B1.1 standard and specified as a no‑go ring, the device is intended for fast pass/fail decisions on the shop floor and at incoming inspection. Its defined acceptance criterion makes it an efficient tool for reducing downstream rework and ensuring component interchangeability.

Robust construction for many inspection cycles

Manufactured from hardened gauge steel, this inspection ring resists wear and preserves its functional limits over repeated use. The material choice and heat treatment ensure dimensional stability under typical workshop handling, so measurements remain repeatable and less dependent on operator technique. For quality systems that rely on repeatable mechanical gauges, this design contributes directly to fewer inspection anomalies.

Clear tolerance definition reduces ambiguity

Marked as tolerance class 2A, the ring is matched to the external thread class used on UNC series fasteners; this makes the acceptance limit unambiguous during routine checks. As a dedicated no‑go tool, it confirms that a thread does not exceed the maximum material condition allowed by the standard, which in turn helps maintain assembly fit and function. The simple mechanical verdict supports lean inspection flows and quick decision cycles in production.

Trusted supply and practical integration

Sourced under the Metav IndustryLine label, the ring suits machine shops, toolrooms and inspection benches requiring robust, standards‑based gauges. Documentation supplied via Metav clarifies ordering and traceability, while the product’s clear specification makes it straightforward to integrate into inspection plans and work instructions. For batches or fleet procurement, the gauge’s standard conformity simplifies supplier comparison and quality planning.

Contact Metav Werkzeuge for application advice and to order the Metav IndustryLine M315.973 thread ring gauge for immediate integration into production inspection

Technical data

• Article number: M315.973
• GTIN: 4054469180649
• Label: Gewinde‑Lehrring UNC NOGO, Nr. 3 x 48 ANSI B1.1 / 2A
• SKU: M315.973

Facts

• Size designation: No. 3
• Threads per inch: 48
• Weight: 0.1 kg
• Tolerance class: 2A
• Tariff number: 90173000

Materials & standards

• Material: hardened gauge steel
• Standard: ANSI/ASME B1.1/B1.2
• Function: no‑go ring for UNC external threads
• Category: gauges / inspection rings

FAQ

What is the primary function of this no‑go ring?
The Thread Ring Gauge UNC NOGO No. 3‑48 is used to verify that an external UNC 3‑48 thread does not exceed the maximum material condition; a successful fit indicates the thread is oversize and therefore rejects the part.

Which standard does this ring conform to?
The ring is manufactured to the ANSI/ASME B1.1 series and its marking reflects the applicable thread standard for UNC 3‑48 threads.

What material is the gauge made from?
The inspection ring is produced from hardened gauge steel, chosen for wear resistance and dimensional stability under repeated use.

How should the tolerance class 2A be interpreted for external threads?
Tolerance class 2A identifies the external thread quality and acceptance limits; the no‑go ring provides a mechanical limit check against those class 2A maximum material conditions.

Is calibration documented for this gauge in the product data?
The supplied product data does not state a calibration certificate; calibration and traceability requirements should be confirmed with Metav Werkzeuge when ordering.

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