Spi 19-099-1 Class Zz Minus Plug Pin Gage 0.099 in

Product Description

The SPI 19-099-1 is a Class ZZ minus plug pin gage machined from steel, designed to verify that a hole or bore meets the minimum acceptable size limit in a go/no-go inspection process. At 0.099 inches in diameter with a tolerance of 0.0002 inches, this gage gives machinists and quality technicians a reliable reference for checking drilled, reamed, or punched holes on the production floor or in the inspection lab. Class ZZ is the standard tolerance class for pin gages used in general-purpose dimensional inspection of manufactured parts.

This pin gage is suited for use in machine shops, fabrication facilities, toolrooms, and quality control departments where consistent hole-size verification is required. The minus designation indicates the gage is ground to the lower end of the tolerance band, making it appropriate for checking minimum material condition. It is typically used by machinists, quality inspectors, and tooling technicians working to tight dimensional specifications.

Key Features

• Class ZZ tolerance class for general-purpose hole inspection
• Minus designation — ground to the lower tolerance boundary for minimum-limit checking
• 0.0002 inch tolerance for repeatable, accurate measurement
• Steel construction for durability in production and inspection environments
• 0.099 inch diameter for small-bore and precision-drilled hole verification

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use with standard go/no-go gage handles and pin gage sets in dimensional inspection applications.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in a protective case away from other metal tools to avoid nicking the gage surface. Clean the gage and the hole being checked before use to ensure accurate results. Follow your facility calibration schedule and applicable ASME B89.1.5 or equivalent gage standards for periodic verification.