Spi 19-089-2 Class Zz Minus Plug Pin Gage 0.089 in

Product Description

The SPI 19-089-2 is a Class ZZ minus plug pin gage with a 0.089-inch nominal diameter, designed for go/no-go inspection and bore measurement in precision machining and quality-control applications. Manufactured from steel, this pin gage holds a tolerance of 0.0002 inches, conforming to Class ZZ standards for dimensional verification. It is used to check hole sizes, verify tolerances, and inspect machined bores where accurate measurement is critical. Machinists, quality technicians, and tool-and-die professionals rely on pin gages like this one to confirm part acceptance without relying solely on calipers or micrometers.

The SPI 19-089-2 is suited for use in production environments, inspection rooms, and machine shops handling small-diameter bore verification. The minus designation means the gage diameter is held below nominal, making it appropriate for applications where the gage must pass freely through an acceptable hole. It is commonly used with gage blocks or as part of a pin gage set for systematic tolerance checking across a range of bore sizes.

Key Features

• Class ZZ tolerance grade for standard inspection and production use
• Minus designation — gage diameter held below nominal for go-gage applications
• 0.0002-inch tolerance (0.0002 mm) for precise dimensional verification
• Steel construction for durability and dimensional stability
• 0.089-inch nominal diameter for small-bore inspection

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in general-purpose bore inspection and dimensional quality-control applications.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils that can affect accuracy. Store the gage in a protective case away from moisture and temperature extremes when not in use. Clean the gage and the bore being measured before use to remove debris that could produce false readings. Do not force a pin gage through a hole — resistance indicates the bore is undersize.