No. 1 x 64 Thread Go/No-Go Ring Gauge UNC 2A ANSI B1.1/B1.2 - Metav IndustryLine

Take advantage of precise thread control, robust hardened gauge steel, and compliance with ANSI/ASME B1.1 to reduce rejects and keep assembly lines moving. Order the Gewinde‑Lehrring directly via Metav Werkzeuge or ask our consultants if needed.

Gewinde‑Lehrring UNC NOGO, No. 1 x 64 – NOGO thread ring gauge, ANSI/ASME B1.1 (Metav IndustryLine)

A Gewinde‑Lehrring UNC NOGO, No. 1 x 64 is a hardened NOGO ring gauge designed to check external UNC threads quickly and reliably in production and inspection workflows.

• Hardened gauge steel for long service life
• Conforms to ANSI/ASME B1.1/B1.2 standard
• No. 1 size, 64 tpi for UNC thread checks
• Tolerance class 2A for external thread control

Ensure rejected parts are caught before assembly

The NOGO ring acts as a decisive pass/fail tool for external threads: the component must not enter the ring if it exceeds tolerances. Built to ANSI/ASME B1.1 requirements and specified as 2A, this gauge provides a clear, standardised limit for acceptable thread form on No. 1 UNC components with 64 tpi. Using a dedicated NOGO control reduces uncertainty compared with visual checks and gives production managers a reproducible criterion for acceptance or rejection.

Faster inspection, fewer production interruptions

A gauge that gives an immediate result shortens inspection time and helps maintain throughput. The NOGO characteristic prevents marginal or oversized threads from proceeding to assembly, lowering the likelihood of costly rework and warranty claims. As a simple handheld control element, the ring integrates seamlessly into in‑process checks or final inspection steps and supports efficient quality control routines on the shop floor.

Robust construction for repeated shop‑floor use

Manufactured from hardened gauge steel, the ring resists wear under repeated engagement, so the limit dimension stays stable over many cycles. The compact No. 1 format and modest mass make handling straightforward while preserving dimensional integrity; the hardened material also minimises abrasion and maintains the calibrated limit. Regular visual inspection and proper storage will maximise service life and retain measuring confidence over time.

Typical applications and inspection practice

This NOGO ring is suited to incoming goods inspection, in‑process checks and final quality control of externally threaded fastenings and shafts specified to UNC series. As a dedicated ring gauge for external threads, it complements GO gauges and additional metrology devices when a full conformity assessment is required. Use the ring within a documented inspection routine to provide traceable, repeatable decisions during production runs.

For secure thread control with Metav IndustryLine gauges, contact Metav Werkzeuge in Emmerich for product availability and application advice on M315.971

Technical data

• Article number: M315.971
• GTIN: 4054469180601
• Name: Gewinde‑Lehrring UNC NOGO, No. 1 x 64 ANSI B1.1 / 2A

Facts

• Pitch: 64 tpi
• Size: No. 1
• Tolerance class: 2A
• Weight: 0.1 kg
• Standard: ANSI/ASME B1.1/B1.2

Special features

• NOGO ring gauge for external threads
• Material: hardened gauge steel
• Category: Lehren / Measuring instruments
• SKU: M315.971

FAQ

What does a NOGO ring gauge check?
A NOGO ring gauge verifies that an external thread does not exceed the maximum limit; the Gewinde‑Lehrring UNC NOGO, No. 1 x 64 (Metav IndustryLine, SKU M315.971) must not accept oversize threads.

How does the 2A tolerance class affect inspection?
Tolerance class 2A defines the permissible profile for external UNC threads; the NOGO ring is manufactured to that class so that M315.971 rejects threads exceeding the 2A external limits.

Can this gauge be used on different thread standards?
The ring is produced for UNC form per ANSI/ASME B1.1/B1.2; it should be used only for threads specified to those standards and the declared pitch of 64 tpi.

How should the NOGO ring be stored and handled?
Store the gauge clean and dry, avoid impact and contamination, and handle by the body rather than by the measuring face to preserve the hardened surfaces of the Gewinde‑Lehrring UNC NOGO, No. 1 x 64.

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