Vermont Gage 361126030 Threaded Ring Gage 1/4-20 Unc 2A

Product Description

The VERMONT GAGE 361126030 is a No Go threaded ring gage designed to verify that external threads do not exceed the maximum material condition allowed under Class 2A tolerance limits. Manufactured from tool steel, this single-ring gage is used to inspect 1/4-20 UNC thread forms in production and quality-control environments. It conforms to NIST standards, making it suitable for applications where traceable measurement accuracy is required. Licensed machinists, quality inspectors, and precision tooling technicians rely on this type of gage to catch out-of-tolerance parts before they move further down the assembly process.

This gage is suited for shop-floor and inspection-room use wherever 1/4-20 UNC externally threaded components are manufactured or verified. Typical applications include fastener production, machined component inspection, and incoming quality control for threaded hardware. The No Go function confirms that threads have not been cut oversized or under-toleranced, which is critical in assemblies requiring consistent thread engagement and load-bearing reliability.

Key Features

• No Go ring gage — confirms threads do not exceed Class 2A maximum material limits
• 1/4-20 UNC thread form — standard unified coarse thread for broad fastener applications
• Class 2A classification — the most common tolerance class for general-purpose external threads
• Single-ring design — dedicated No Go function for clear, unambiguous inspection results
• Tool steel construction — provides durability and dimensional stability under regular shop use
• NIST-standard conformance — supports traceable quality inspection processes

Compatibility

Designed for inspection of external 1/4-20 UNC Class 2A threaded components such as fasteners, studs, and machined parts requiring conformance to unified coarse thread standards.

Installation Notes

Threaded ring gages are handled and used by quality inspectors or machinists — no installation in the traditional sense applies. Store the gage in a clean, dry environment and handle it with clean gloves or lint-free cloths to prevent corrosion and dimensional drift from skin oils. Do not force the gage onto a thread; a No Go gage that spins freely onto a thread indicates a nonconforming part. Calibration intervals should follow your facility's quality management system requirements.