Spi 19-038-9 Class Zz Minus Plug Pin Gage 0.038 in

Product Description

The SPI 19-038-9 is a Class ZZ minus plug pin gage machined from steel, used to verify that a hole or bore falls within a specified minimum dimensional tolerance. At 0.038 inches in diameter with a tolerance of 0.0002 inches, this gage provides precise go/no-go inspection capability for small-bore quality control. Class ZZ designates the lowest tolerance class in the plug gage series, suitable for general inspection work where production tooling and moderate-precision gauging are required. Machinists, toolmakers, and quality control technicians use this type of gage in shop-floor and inspection environments.

This pin gage is designed for use in manufacturing and machining operations where small-diameter hole inspection is required. It is well suited to incoming inspection, in-process quality checks, and final verification of drilled, reamed, or punched holes in metal, plastic, or composite workpieces. The minus designation indicates the gage is ground to the lower limit of the nominal diameter, which is standard practice for go-gage applications.

Key Features

• Class ZZ tolerance class for general-purpose plug gage inspection
• Nominal diameter of 0.038 inches for small-bore applications
• Tolerance of 0.0002 inches ensuring dimensional accuracy
• Minus designation ground to lower limit of nominal size
• Steel construction for durability in shop-floor environments

Compatibility

Designed as an OEM-style replacement or direct-use Class ZZ plug pin gage for standard small-bore inspection applications in machining and manufacturing environments.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Before use, clean the gage and the bore being inspected to remove chips, oil, or debris that could affect measurement accuracy. Store the gage in its protective case when not in use to prevent damage to the precision-ground surface. This type of inspection tool does not require installation but should be periodically recalibrated against a certified standard to maintain traceability.