5/8" UNF Thread Gauge GO 5/8 x 18, Right-Hand, Hardened Gauge Steel, ANSI B1.1/B1.2 - Metav IndustryLine

Take advantage of the combination of hardened gauge steel, ANSI/ASME conformity and tolerance class 2A to ensure reproducible go/no‑go checks on UNF external threads; order directly via Metav Werkzeuge or consult our specialists for application advice.

Thread ring gauge UNF GO, 5/8" x 18 (ANSI/ASME B1.1) — Metav IndustryLine

The Thread ring gauge UNF GO, 5/8 x 18 ANSI/ASME B1.1 / 2A is a precision GO ring for swift verification of external UNF threads in production and inspection environments

• UNF GO gauge 5/8" x 18
• Tolerance class 2A precision
• Hardened gauge steel construction
• Conforms to ANSI/ASME B1.1 standard

Rapid go/no‑go checks that keep production moving

The GO ring gauge offers a straightforward, repeatable method for checking external UNF threads: if the part enters the ring without binding, the thread is within the acceptable limits defined by the standard. Built to be used on the shop floor, this gauge reduces inspection time compared with full metrological measurement while maintaining reliable quality control. Compliance with ANSI/ASME B1.1 ensures that checks are meaningful across suppliers and assemblies, supporting consistent interchangeability and fewer assembly rejects.

Precision backed by tolerance class and thread form

Tolerance class 2A indicates the intended fit for external threads; when paired with a matching GO ring, it verifies that the major and pitch diameters meet the specified allowance for an external thread to assemble correctly. The ring is specified for 5/8" x 18 tpi, a common UNF size, and is manufactured to reproduce the thread form required by the standard. The designation of right‑hand thread confirms the handedness of the gauge, preventing ambiguity during routine inspections and ensuring the correct application in production lines handling standard UNF fastenings.

Durable construction for frequent inspections

Manufactured from hardened gauge steel, the ring resists wear during repeated engagement, preserving the reference geometry and extending service life. The compact mass and robust finish make it suitable for use at inspection benches and in production areas where tools are handled frequently. Stored and treated as a precision reference, the gauge supports consistent go/no‑go decisions over long production runs, contributing to overall process reliability and lower scrap rates.

For expert guidance on integrating the Metav IndustryLine GO ring gauge into existing inspection workflows, contact Metav Werkzeuge in Emmerich on +49 2822 7131930 or by email at info@metav-werkzeuge.com

Technical Data

• Article number: M315.956.F
• Label: Gewinde-Lehrring UNF GO , 5/8 x 18 ANSI B1.1 / 2A
• GTIN: 4054469180335
• Manufacturer: Metav IndustryLine

Core specifications

• Thread size: 5/8" x 18 tpi
• Pitch: 18 tpi
• Tolerance class: 2A
• Weight: 0.2 kg

Materials & features

• Material: hardened gauge steel
• Feature: right-hand thread
• Standard: ANSI/ASME B1.1/B1.2
• Condition: good

FAQ

What is the purpose of a GO ring gauge?
A GO ring gauge checks whether an external thread meets the maximum material limits; the Thread ring gauge UNF GO, 5/8 x 18 confirms that a part will assemble with a mating internal thread without interference.

Does the GO ring match UNF standards?
Yes, the ring is made to the UNF specification and referenced to ANSI/ASME B1.1, so the Thread ring gauge UNF GO, 5/8 x 18 is suitable for standard UNF thread verification.

What does tolerance class 2A mean for this gauge?
Tolerance class 2A designates the external thread tolerance grade; when used with the GO ring, the 2A classification ensures the external thread fits within the intended allowance for general engineering assemblies.

Is the gauge suitable for frequent shop use?
The Thread ring gauge UNF GO, 5/8 x 18 is manufactured from hardened gauge steel for wear resistance, making it appropriate for repeated go/no‑go checks in production and inspection environments.

How is the handedness indicated?
This product is specified as a right‑hand thread gauge, which is noted in the product data and should be matched to the threads being inspected.

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