Spi 19-819-2 Class Zz Minus Plug Pin Gage 0.819 in

Product Description

The SPI 19-819-2 is a Class ZZ minus plug pin gage machined from steel and designed for go/no-go dimensional inspection of bored holes, drilled passages, and precision-machined features measuring 0.819 inches in diameter. The minus tolerance designation means the gage is ground to the low end of the tolerance band, making it suitable for checking minimum hole size acceptance. With a tolerance of 0.0002 inches, this gage delivers the precision required for quality control in manufacturing, machining, and toolroom environments. Machinists, quality technicians, and toolroom professionals are the primary users of this instrument.

This gage is used in production and inspection settings where hole diameter verification is required. Typical applications include incoming inspection of machined parts, in-process quality checks on CNC and manual machining operations, and toolroom gauging work. It is suited for both light manufacturing and high-tolerance production environments where Class ZZ accuracy is specified by engineering or quality plans.

Key Features

• Class ZZ minus tolerance class for checking minimum acceptable hole diameter
• 0.819 inches nominal diameter for direct measurement of corresponding bored or drilled features
• Tolerance of 0.0002 inches provides high-precision dimensional verification
• Steel construction for durability and dimensional stability in shop environments
• Single-piece design with no adjustments required for consistent, repeatable results

Compatibility

Designed as a standard Class ZZ minus plug gage for use in any application requiring go/no-go inspection of 0.819-inch diameter holes in accordance with applicable gauging standards.

Installation Notes

Plug pin gages require no installation but should be handled and stored carefully to protect the ground gauging surface from nicks, burrs, and corrosion. Clean the gage and the part bore before use to ensure accurate readings. Allow the gage and workpiece to reach the same ambient temperature before gauging, particularly when working in environments subject to thermal variation. Periodic inspection and recertification against traceable standards is recommended to confirm continued accuracy.