Spi 19-953-9 Class Zz Minus Plug Pin Gage 0.953 in

Product Description

The SPI 19-953-9 is a Class ZZ minus plug pin gage with a nominal diameter of 0.953 inches, manufactured from steel for dimensional inspection and go/no-go gauging applications. It carries a tolerance of 0.0002 inches, placing it within the Class ZZ specification for lower-precision inspection work. Plug pin gages like this one are used to verify hole diameters, check bore sizes against engineering tolerances, and confirm machined features meet print specifications. This gage is a standard tool for quality control technicians, machinists, and inspection personnel working in manufacturing, fabrication, and precision machining environments.

This gage is suited for inspection of drilled, reamed, or bored holes in production and job-shop environments. Class ZZ minus gages are commonly used for incoming inspection, in-process checks, and final verification where extremely tight gage tolerances are not required. The 0.953-inch diameter makes it applicable to a range of standard and close-tolerance hole inspections. It is appropriate for use on metals, plastics, and other machinable materials where dimensional conformance must be documented.

Key Features

• Nominal diameter of 0.953 inches for direct hole inspection at that size
• Class ZZ minus tolerance of 0.0002 inches for reliable go/no-go gauging
• Steel construction provides durability and resistance to wear during repeated use
• Compact and lightweight at 0.2 pounds for easy bench or portable use
• Single-piece package quantity suits individual inspection stations or tool kits

Compatibility

Designed as an OEM-style replacement or direct addition to standard plug pin gage sets used in dimensional inspection and quality control applications.

Installation Notes

Plug pin gages require no installation in the traditional sense but should be handled and stored carefully to protect the precision ground surface from nicks, corrosion, and thermal distortion. Allow the gage and workpiece to reach the same ambient temperature before use to avoid measurement errors caused by thermal expansion. Clean the gage and the bore being checked before each use. Gages should be recalibrated or checked against a master reference standard at regular intervals per your facility quality plan.