1/4" 28 TPI UNF Thread Go Plug Gauge Right-Hand ANSI B1.1 2B - Metav IndustryLine

Ensure consistent thread quality with a hardened gauge‑steel thread plug gauge for UNF 1/4 x 28 (ANSI/ASME B1.1), right‑hand and tolerance class 2B — robust construction and standards compliance for reliable production checks. Order the thread plug gauge directly via Metav Werkzeuge or consult the advisers for application matching.

Thread plug gauge UNF 1/4 x 28 (ANSI/ASME B1.1) — hardened gauge steel, 2B

A thread plug gauge UNF 1/4 x 28 (2B) designed for pass/fail verification of internal UNF threads to ANSI/ASME B1.1 in production, inspection and quality‑control environments.

• Hardened gauge steel construction
• ANSI/ASME B1.1 thread profile compliance
• Tolerance class 2B for internal threads
• Right‑hand UNF 1/4‑28 profile

Secure, standards‑based verification for production lines

Built to the ANSI/ASME B1.1 thread form, this plug gauge provides a straightforward method for pass/fail inspection of internal UNF threads. The hardened gauge steel body resists wear during repeated engagement, maintaining the reference profile so that thread checks remain consistent over time. By using a dedicated thread gauge with a defined tolerance class 2B, manufacturers reduce subjective judgement in assembly and inspection processes, which helps to lower rework rates and supports reproducible production outcomes.

Durable handling and predictable performance

The compact, lightweight construction (approx. 0.1 kg) makes the gauge easy to handle at the inspection bench while the hardened material sustains dimensional stability under everyday workshop use. The right‑hand UNF 1/4 x 28 profile is commonly used in mechanical assemblies and fastener systems, and the gauge is intended for rapid go/no‑go verification when high throughput is required. The clear physical design simplifies operator training and enables quick, repeatable checks without additional measurement equipment.

Clear fit specification for quality assurance

Tolerance class 2B denotes the standard internal‑thread fit under ANSI practice and is widely accepted for general engineering applications. Using a purpose‑made plug gauge reduces ambiguity when assessing whether a threaded bore meets the required functional fit. The combination of an industry‑recognised standard, hardened gauge material and the specified pitch (28 tpi) lends confidence to quality documentation and audit trails, supporting both in‑house control procedures and external conformity checks.

For reliable, standards‑based thread inspection, request the Metav IndustryLine UNF 1/4 x 28 thread plug gauge through Metav Werkzeuge — our advisers in Emmerich will assist with technical matching and delivery.

Technical Data

• Article number: M315.920.F
• GTIN: 4054469179537
• Material: Gauge steel, hardened
• Mass: 0.1 kg
• Standard: ANSI/ASME B1.1/B1.2
• Thread size: 1/4" x 28 UNF
• Pitch: 28 tpi
• Tolerance class: 2B
• Right‑hand thread

Facts

• Weight: 0.1 kg
• Pitch: 28 threads per inch
• Thread form: UNF 1/4 x 28
• Tolerance: 2B

Special features

• Hardened gauge‑steel construction
• Designed for pass/fail inspection of internal threads
• Conforms to ANSI/ASME B1.1/B1.2
• Right‑hand thread profile
• Category: Thread gauges / Plug gauges

FAQ

What is the intended use of this thread plug gauge?
The thread plug gauge UNF 1/4 x 28 is intended for pass/fail verification of internal UNF threads in production and inspection routines, ensuring compliance with ANSI/ASME B1.1 and the 2B internal‑thread tolerance.

Is the gauge suitable for everyday workshop inspection?
Yes. The Metav IndustryLine plug gauge, made from hardened gauge steel, is built for repetitive use on the shop floor and provides a durable reference for routine thread checks.

What does tolerance class 2B mean for this gauge?
Tolerance class 2B specifies the internal‑thread fit under ANSI practice; the plug gauge verifies whether the threaded bore meets the standard internal fit expected for general engineering assemblies.

Can this gauge be used for both right‑hand and left‑hand threads?
This particular gauge is manufactured with a right‑hand UNF 1/4 x 28 profile; left‑hand threads require a dedicated left‑hand gauge.

Which standards does the product follow?
The product conforms to ANSI/ASME B1.1/B1.2 for UNF thread form and pitch, providing compatibility with common engineering and inspection protocols.

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