Vermont Gage 112408870 Class Zz Minus Plug Pin Gage 8.87 Mm

Product Description

The VERMONT GAGE 112408870 is a Class ZZ minus plug pin gage machined to an 8.87 mm diameter for NoGo inspection work. It is a single-ended steel pin gage used to verify that a bored or reamed hole does not fall below the minimum acceptable size. The tolerance is held to 0.00508 mm, making it suitable for precision go/nogo attribute gauging in production and quality-control environments. Each unit ships with a Certificate of Accuracy that includes NIST traceability, satisfying documentation requirements in ISO and aerospace inspection workflows. Overall length is 2 inches. Licensed metrologists, quality technicians, and toolroom machinists are the primary users.

This pin gage is applied during incoming inspection, in-process checking, and final inspection of machined bores where an 8.87 mm nominal diameter is specified. It is used alongside go-class gages to establish a complete attribute-gauging pair. Typical applications include checking holes in precision machined components, verifying setting dimensions on micrometers, verniers, and other variable measuring devices, and confirming bore size on toolroom fixtures. The minus designation means the gage is ground to the lower limit of the tolerance band, consistent with Class ZZ nogo application conventions.

Key Features

• Class ZZ minus tolerance ground to 0.00508 mm for nogo attribute gauging
• 8.87 mm diameter for direct plug-and-check bore verification
• Steel construction with 10 microfinish surface coating for consistent contact and wear resistance
• Overall length of 2 inches for ergonomic single-hand use
• Includes Certificate of Accuracy with NIST traceability for documented quality systems
• Suitable for setting micrometers, verniers, and other measuring devices to a known reference dimension

Compatibility

Designed as an OEM-style Class ZZ minus plug pin gage for use in standard attribute-gauging applications requiring an 8.87 mm nogo reference, compatible with micrometer setting, vernier verification, and bore inspection procedures as described in the supplier application data.

Installation Notes

Pin gages are handled and applied by quality technicians, metrologists, and toolroom machinists - no power source or utility shutoff is required. Always clean and deburr the bore and the gage shank before use to prevent damage to the ground surface. Store the gage in its protective sleeve when not in use to preserve the 10 microfinish surface and maintain calibration integrity. Apply only hand-push force during inspection; never hammer or force a plug gage into a bore.