Spi 19-422-5 Class Zz Minus Plug Pin Gage 0.422 in

Product Description

The SPI 19-422-5 is a Class ZZ minus plug pin gage used to verify hole diameters in precision machining and inspection applications. Built to Class ZZ tolerance standards, this gage checks whether a hole is at or above the minimum acceptable diameter. The 19-422-5 measures a nominal diameter of 0.422 inches with a tolerance of 0.0002 inches, making it suitable for general-purpose go/no-go inspection work. The steel construction provides durability and dimensional stability under typical shop conditions. Machinists, quality control technicians, and tool-and-die professionals use this type of gage as part of standard dimensional verification workflows.

This pin gage is intended for use in machine shops, manufacturing facilities, and inspection departments where hole diameter conformance must be confirmed to close tolerances. The minus designation means the gage is ground to the low side of the nominal diameter, which is standard practice for go-gage applications. It is appropriate for inspecting drilled, reamed, or bored holes in production and prototype settings where dimensional accuracy is critical.

Key Features

• Class ZZ tolerance rating for general-purpose dimensional inspection
• Nominal diameter of 0.422 inches with 0.0002 inch tolerance
• Minus designation confirms ground-to-low-side calibration for go-gage use
• Steel construction for shop-floor durability and dimensional stability
• Single-piece design ready for immediate use in go/no-go inspection setups

Compatibility

Designed as a direct-fit replacement or addition to standard Class ZZ plug gage sets used in general-purpose hole inspection for 0.422 inch nominal diameter applications.

Installation Notes

Plug pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, verify the gage is clean and free of burrs or debris that could affect the measurement. Store the gage in a protective case when not in use to prevent damage to the ground surface. Gage calibration should be verified periodically against a traceable standard per your facility quality procedures.