Spi 19-969-5 Class Zz Minus Plug Pin Gage 0.9690 in

Product Description

The SPI 19-969-5 is a Class ZZ minus plug pin gage designed to verify bore and hole diameters with precision and repeatability. Built to Class ZZ tolerance standards, this gage measures a nominal diameter of 0.9690 inches with a tolerance of 0.0002 inches in the minus direction, meaning the gage is manufactured slightly under nominal to serve as a go or no-go reference. Constructed from steel for durability and dimensional stability, it is a standard tool in quality control, inspection, and machining environments where accurate hole qualification is required.

Class ZZ plug gages are commonly used in production and inspection settings where high-volume hole checking is performed and absolute gage-block-grade accuracy is not required. This gage is appropriate for checking drilled, reamed, or bored holes in metalworking, fabrication, and light manufacturing applications. It is well suited for use by machinists, QC inspectors, and toolroom technicians working with standard tolerance fits.

Key Features

• Class ZZ tolerance classification for production-grade hole inspection
• Minus designation indicates gage is manufactured below nominal for go-gage applications
• 0.9690 inch nominal diameter with 0.0002 inch tolerance
• Steel construction for wear resistance and dimensional stability
• Single-piece gage format for straightforward manual inspection use

Compatibility

Designed as a standard Class ZZ minus plug gage for use in bore and hole inspection applications requiring a nominal diameter of 0.9690 inches.

Installation Notes

Plug pin gages require no installation but should be handled with care to avoid surface damage that could affect measurement accuracy. Store the gage in a protective case away from moisture and temperature extremes to maintain dimensional integrity. Clean the gage and the bore being measured before use to prevent debris from affecting results. Gages should be periodically recalibrated by a qualified metrology lab to confirm they remain within tolerance.