1/4" 20 TPI Thread Go Ring Gauge UNC ANSI B1.1 2A Hardened Gauge Steel - Metav IndustryLine

Taking advantage of ANSI/ASME B1.1 conformity, hardened gauge steel construction and a defined 2A GO tolerance ensures reliable acceptance testing of UNC threads; order this ring gauge directly via Metav Werkzeuge or consult our specialists for specification support.

Thread ring gauge UNC GO, 1/4‑20 2A — GO ring gauge for UNC thread inspection (Metav IndustryLine)

The Thread ring gauge UNC GO, 1/4 x 20 ANSI B1.1 / 2A is a precision acceptance gauge designed for fast, repeatable verification of 1/4‑20 UNC external threads in production and incoming‑goods inspection.

• ANSI/ASME B1.1 compliant GO gauge
• Tolerance class 2A for acceptance testing
• Hardened gauge steel for wear resistance

Ensured conformity for production control

A GO thread ring gauge in 1/4‑20 UNC provides a fast, unequivocal pass/fail check that fits directly into statistical process control and shop‑floor inspection routines. Built to ANSI/ASME B1.1, the gauge defines the maximum material condition for acceptable external threads; the 2A tolerance class means the thread is checked against the specified allowance and pitch form for the UNC series. Using a dedicated ring gauge reduces measurement interpretation, accelerates sample throughput and lowers scrap rates by ensuring only parts within the defined envelope proceed to assembly.

Durable construction for repetitive use

Manufactured from hardened gauge steel, the ring resists wear from repeated engagement and maintains its functional limits over long inspection runs. The compact design and low mass make handling straightforward while retaining the stiffness necessary for repeatable seating on the thread. Material selection and hardening are decisive for lifetime cost; a rugged gauge reduces rework and replacement cycles, improving overall process efficiency. The lightweight profile (approximately 0.1 kg) supports ergonomic inspection workflows without compromising stability.

Practical use and integration into quality systems

The gauge is intended for use in routine acceptance checks, manual go/no‑go inspection stations and portable inspection kits. Its compliance with ANSI/ASME B1.1/B1.2 allows direct comparison with specification sheets and drawing notes, simplifying documentation for quality records. Where formal traceability is required, the ring can be referenced in inspection reports as the functional test instrument for the 1/4‑20 UNC thread. For workshops and manufacturing lines seeking clear, rapid decisions on thread conformity, this GO ring offers a straightforward, standards‑based solution.

Contact Metav Werkzeuge today to discuss how the Metav IndustryLine GO ring gauge can be integrated into existing inspection plans or to request further specification details and availability.

Technical Data

• Article number: M315.950
• GTIN: 4054469180151
• Label: Gewinde-Lehrring UNC GO, 1/4 x 20 ANSI B1.1 / 2A
• Mass / size: 1/4"
• Thread pitch: 20
• Tolerance class: 2A
• Material: Lehrenstahl, hardened
• Standard: ANSI/ASME B1.1/B1.2
• Weight: 0.1 kg

Facts

• Thread series: UNC
• Function: GO (acceptance) ring gauge
• Application: Production inspection, incoming goods
• Category: Gauges / Thread inspection

Special features

• Hardened gauge steel construction
• Metav IndustryLine product
• Suitable for assembly acceptance testing
• Compact, ergonomic form factor

FAQ

What does the 2A tolerance class indicate for this gauge?
The 2A tolerance class denotes the specified allowance and pitch form for external UNC threads; this gauge checks conformance to that class for 1/4‑20 UNC parts.

Is this gauge suitable for production testing of 1/4‑20 UNC fasteners?
Yes, the Thread ring gauge UNC GO, 1/4 x 20 ANSI B1.1 / 2A is intended for rapid production acceptance testing of 1/4‑20 UNC external threads.

Which standard does the ring gauge follow?
The gauge is manufactured to ANSI/ASME B1.1/B1.2, enabling direct use against ANSI UNC thread specifications.

What material is used and why is it important?
The ring is made from hardened gauge steel, chosen to resist wear from repeated engagement and preserve functional limits over many inspection cycles.

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