No. 4 x 48 UNF Thread Plug Gauge, Right-Hand, 2B, ANSI/ASME B1.1 - Metav IndustryLine

Take advantage of the combination of ANSI/ASME conformity, hardened gauge steel and a clear 2B tolerance for fast, repeatable thread inspection; order the gauge directly via Metav Werkzeuge or consult our specialists for application advice.

Thread plug gauge UNF No. 4 × 48 (ANSI/ASME B1.1) – hardened gauge steel, 2B

The Thread plug gauge UNF No. 4 × 48 (ANSI/ASME B1.1 / 2B) is a right‑hand plug gauge designed for rapid verification of internal UNF threads in production and inspection environments.

• Right-hand UNF No. 4 × 48 thread gauge
• Hardened gauge steel for long life
• ANSI/ASME B1.1 compliant for UNF threads
• Tolerance class 2B go/no‑go checking

Ensure conformance without slowing production

A plug gauge built to ANSI/ASME B1.1 permits quick confirmation of internal UNF threads to an industry standard. The go/no‑go principle embedded in the design reduces inspection time while providing an unequivocal pass/fail result, helping maintain throughput on the shop floor. By using a gauge with 2B tolerance, inspectors gain an objective reference that aligns with common assembly and quality criteria, aiding traceability and reducing rework.

Durable material and geometry for repeatable checks

Manufactured from hardened gauge steel, the gauge resists wear from repeated use and preserves its functional dimensions over many inspection cycles. The right‑hand UNF geometry, sized No. 4 × 48, matches common fine‑thread applications and ensures correct engagement during measuring routines. Robust material selection combined with precise thread form means less frequent replacement and consistent contact behaviour when checking internal threads in a variety of components.

Practical advantages for quality teams and production lines

Compact and lightweight, the tool delivers reliable verification with minimal handling effort; the small mass facilitates fast manoeuvring in confined assemblies. The standardised thread specification simplifies inventory management and supplier communication, while the clear go/no‑go functionality helps operators make rapid decisions. Integration into existing inspection plans is straightforward, supporting both spot checks and routine batch control without the need for additional measurement equipment.

Designed for industrial use and straightforward documentation

Traceability is supported by the clear specification and the included identifiers; the gauge is intended for regular use in inspection benches and assembly controls where repeatability matters. The combination of ANSI/ASME compliance, hardened construction and recognised 2B tolerance makes the tool suitable for tasks from subcontractor incoming inspection to final assembly checks. For quality records, the item can be referenced by its part number and GTIN to link inspection results to specific tools.

For dependable UNF thread verification, request a quote or technical consultation from Metav Werkzeuge (Emmerich) at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: M315.914.F
• GTIN: 4054469179391
• Weight: 0.1 kg
• Material: hardened gauge steel
• Standard: ANSI/ASME B1.1/B1.2

Facts

• Thread size: No. 4
• Threads per inch: 48 TPI
• Tolerance class: 2B
• Tariff number: 90173000

Special features

• Right-hand thread
• Go/no‑go plug gauge design
• Category: Lehren / Messstifte
• Intended for internal UNF thread verification

FAQ

What thread form does the gauge check?
The gauge checks internal UNF No. 4 × 48 threads in accordance with ANSI/ASME B1.1, offering a go/no‑go indication to confirm correct form.

Is the gauge suitable for production line inspection?
Yes. The hardened gauge steel and simple go/no‑go function make it suitable for repeated checks on production lines and incoming inspection.

What does tolerance class 2B mean for this gauge?
Tolerance class 2B denotes the standard internal thread tolerance for unified threads; the plug gauge is manufactured to verify that internal threads meet this common tolerance class.

How should the gauge be recorded in quality documentation?
Reference the article number M315.914.F and GTIN 4054469179391 when recording measurements to ensure traceability in quality records.

Can the gauge be used for non-UNF thread systems?
This plug gauge is produced specifically for UNF No. 4 × 48 threads; different thread systems require gauges manufactured to the corresponding standard and size.

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