Spi 19-547-9 Class Zz Minus Plug Pin Gage 0.547 in

Product Description

The SPI 19-547-9 is a Class ZZ minus plug pin gage with a 0.547-inch nominal diameter, manufactured from steel for dimensional inspection work. This gage is used to verify that a hole or bore meets minimum size requirements by checking whether the pin passes through the feature being measured. Class ZZ is the standard tolerance grade for go/no-go plug gages used in general production inspection. With a tolerance of 0.0002 inches, the 19-547-9 is suited to routine quality control applications where high precision is required but Class Z or ZZ accuracy is acceptable. It is typically handled by quality control technicians, machinists, and toolroom personnel.

This plug pin gage is used in production and inspection environments to verify hole diameters in machined components, cast parts, and fabricated assemblies. As a minus-tolerance gage, the 19-547-9 is ground to the low side of the nominal diameter, making it appropriate for go-gage applications where the part feature must accept the gage to confirm minimum acceptable size. It fits standard gage handle sets for ease of use during high-volume inspection routines in machine shops, manufacturing facilities, and quality labs.

Key Features

• Class ZZ minus tolerance grade for general production inspection
• 0.547-inch nominal diameter for precise hole and bore verification
• Tolerance of 0.0002 inches for consistent, repeatable measurements
• Steel construction for durability and wear resistance in shop environments
• Compatible with standard gage handles for efficient single-hand operation

Compatibility

Designed as an OEM-style replacement or standard addition to plug gage sets used in general machining and production inspection applications. Compatible with standard gage handles sized for 0.547-inch diameter pin gages.

Installation Notes

Plug pin gages are installed by quality control personnel and machinists as part of go/no-go inspection routines. Before use, clean both the gage and the feature being inspected to remove chips, oils, or debris that could affect measurement accuracy. Handle the gage carefully to avoid dropping or striking it, as impact damage can alter the ground diameter and invalidate the tolerance. Store the gage in a protective case when not in use to prevent corrosion and surface wear.