Spi 19-689-9 Class Zz Minus Plug Pin Gage 0.689 in

Product Description

The SPI 19-689-9 is a Class ZZ minus plug pin gage machined from steel, used to verify that a hole or bore meets minimum dimensional tolerance in precision inspection work. The gage measures 0.689 inches in diameter with a minus tolerance of 0.0002 inches, making it a go-side reference tool for confirming that a feature is no smaller than the specified lower limit. Machinists, quality control inspectors, and toolroom technicians rely on pin gages like this one to perform fast, repeatable attribute inspection without the need for electronic measuring instruments.

Class ZZ plug pin gages are the standard choice for general-purpose inspection of drilled, reamed, or punched holes in production and job-shop environments. This gage is suited for use on metal, plastic, and composite workpieces where a 0.689-inch nominal bore diameter must be confirmed to tolerance. It is commonly used as a standalone pin or as part of a set in a pin gage assortment for incoming inspection, in-process checks, or final quality verification.

Key Features

• Class ZZ tolerance class for general-purpose go or no-go attribute inspection
• Minus designation confirms the gage is ground to the lower allowable limit of the nominal diameter
• 0.0002 inch tolerance provides reliable dimensional reference at 0.689 inches nominal diameter
• Steel construction for durability and wear resistance in production environments
• Compact, lightweight form at 0.2 pounds for easy one-handed use and storage

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general-purpose attribute inspection of 0.689-inch nominal diameter bores and holes across a wide range of materials and manufacturing applications.

Installation Notes

Pin gages are hand-held inspection tools and require no fastening or wiring. Clean the gage and the bore being checked before use to prevent contamination from affecting the measurement result. Handle with care to avoid dropping, which can alter the ground surface and invalidate the tolerance. Store in a protective case or roll when not in use to prevent corrosion and surface damage.