No. 4 x 40 UNC Thread Plug Gauge, 2B, Hardened Gauge Steel, ANSI/ASME B1.1 - Metav IndustryLine

Take advantage of a compact inspection tool that combines ANSI/ASME conformity, hardened gauge steel construction and a 2B tolerance class for dependable thread verification; order the gauge directly via Metav Werkzeuge or ask our consultants if needed.

Thread plug gauge UNC No. 4‑40 (ANSI/ASME B1.1) – hardened gauge steel, 2B tolerance

The Thread plug gauge UNC, No. 4‑40 is a compact inspection gauge for confirming internal thread size and fit to the UNC standard in industrial metrology.

• Hardened gauge steel construction
• ANSI/ASME B1.1/B1.2 conformity
• UNC No. 4‑40 thread size, 2B class
• Precision inspection for internal threads

Ensure conformity with recognised thread standards

Manufactured to ANSI/ASME B1.1/B1.2, the plug gauge provides a fast, reliable decision on whether an internal thread meets specification. The simple pass/fail check afforded by a correctly sized plug minimises downstream rework and supports production throughput: parts that accept the No. 4‑40 UNC gauge are confirmed to meet the nominal size and thread form, while failures are immediately identified for correction. This direct evidence of conformity reduces inspection time and supports consistent quality in machining and assembly operations.

Robust material and geometry for long service life

The body is made from hardened gauge steel, a choice that balances wear resistance and dimensional stability under regular workshop use. Heat treatment and finishing ensure the working surfaces retain form across repeated engagements, delivering reproducible results over many cycles. The compact size and modest mass facilitate easy handling at the inspection bench while the hardened construction protects critical thread flanks against premature wear, keeping maintenance intervals low and replacement costs predictable.

Integrates with workshop quality procedures and traceability

As a standardised thread plug gauge, this tool fits directly into routine quality-control steps for thread verification. It is suitable for inline checks during batch production as well as spot checks on assembly receipts. The item is identified by SKU M315.914 and GTIN 4054469179384, which helps with inventory management and traceability in quality documentation. For customers seeking straightforward inspection tools, the gauge offers an efficient combination of precision and ease of use, supporting reliable go/no-go decisions without complex setup.

Contact Metav Werkzeuge for expert advice on gauge selection and to request the Metav IndustryLine UNC No. 4‑40 thread plug gauge (SKU M315.914) for immediate integration into existing quality routines

Technical data

• Article number: M315.914
• GTIN: 4054469179384
• Weight: 0.1 kg
• Material: Hardened gauge steel
• Standard: ANSI/ASME B1.1/B1.2

Facts

• Thread size: No. 4‑40 UNC
• Pitch: 40 tpi
• Tolerance class: 2B

Special features

• Category: Thread plug gauge
• Label: Gewinde‑Lehrdorn UNC, Nr. 4 x 40 ANSI B1.1 / 2B
• Suitable for internal thread verification

FAQ

What thread standard does this gauge verify?
The gauge verifies internal threads manufactured to the ANSI/ASME B1.1/B1.2 standard; the M315.914 checks a No. 4‑40 UNC thread in tolerance class 2B.

Is the gauge suited for production-line checks?
Yes, the hardened‑steel thread plug gauge is designed for repeated go/no‑go checks and is appropriate for inline sampling during batch production.

What does the 2B tolerance class mean for inspection?
A 2B tolerance class indicates the standard tolerance for internal UNC threads; the plug gauge confirms whether internal threads meet that specified fit and clearance.

Which material is used for the gauge and why?
The tool is made from hardened gauge steel to ensure wear resistance and dimensional stability over many inspection cycles.

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