Vermont Gage 112103060 Class Zz Plus Plug Gage 3.06mm

Product Description

The VERMONT GAGE 112103060 is a Class ZZ Plus plug gage machined from tool steel and designed for go inspection of bored, reamed, or drilled holes. It measures 3.06 mm in diameter with a tolerance of 0.005 mm (0.00508 mm actual), and carries a 10 microfinish surface finish on the gaging member. At 2.0000 inches overall length, it fits comfortably in standard gage handle sets used on the shop floor. A Certificate of Accuracy with NIST traceability is included, making it suitable for calibrated inspection programs that require documented measurement standards. Machinists, quality technicians, and tool room personnel are the primary users.

This plug gage is used to verify whether a hole is at or above its minimum allowable size — the go condition — in production and inspection environments. It is appropriate for both light manufacturing and precision machining operations where hole tolerances are held to close limits. Compatible applications listed by the manufacturer include go inspection, setting micrometers, verniers, and other measuring devices. It is equally suited to incoming inspection, first-article inspection, and in-process quality checks on machined components.

Key Features

• Class ZZ Plus tolerance grade with 0.005 mm tolerance for close-tolerance hole inspection
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface finish on the gaging member for accurate, repeatable contact
• Certificate of Accuracy with NIST traceability included — ready for calibrated inspection programs
• Conforms to ASME B89.1 dimensional gage standards
• 2.0000 inch overall length fits standard gage handle sets

Compatibility

Suitable for go inspection of holes nominally sized at 3.06 mm. Also compatible with setting micrometers, verniers, and other measuring devices as stated by the manufacturer. Designed for use with standard plug gage handles sized for small-diameter gaging members.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, verify the gage is at ambient temperature (typically 68 degrees F or 20 degrees C per ASME B89.1 reference conditions) to avoid thermal expansion errors. Do not force the gage through a hole; go gages should pass under their own weight or with minimal hand pressure. Store in a protective case away from abrasive materials when not in use.