Spi 22-165-5 Class Zz Plug Gage Set 0.501-0.625 in 125 Pc

Product Description

The SPI 22-165-5 is a Class ZZ plug gage set covering a diameter range of 0.501 to 0.625 inches in 125 individual steel pin gages. Each pin holds a minus tolerance of 0.0002 inches, meeting NIST traceable standards for dimensional inspection work. The set is used to verify hole sizes, slot widths, and distances between holes with speed and repeatability. A certificate of accuracy and a pin gage holder are included. Licensed metrologists, quality control technicians, and precision machinists rely on plug gage sets like this for go/no-go inspection in production and maintenance environments.

This set is suited for shop floor and inspection room use wherever holes or slots must be verified to tight tolerances. The 0.501 to 0.625 inch range covers a wide band of common fastener and bore sizes encountered in machining, fabrication, and mechanical assembly. The no-go gaging application makes it practical for incoming inspection, in-process quality checks, and final acceptance testing. The included pin gage holder keeps pins organized and accessible during repetitive measurement tasks.

Key Features

• 125-piece steel pin gage set covering 0.501 to 0.625 inches in diameter
• Class ZZ tolerance of 0.0002 inches (minus tolerance type) for inspection-grade accuracy
• NIST traceable certificate of accuracy included with each set
• Suitable for measuring hole sizes, slot widths, and distances between holes
• Supports no-go gaging inspection workflows
• Includes pin gage holder for organized storage and quick access

Compatibility

Designed as an OEM-style replacement and standard complement for Class ZZ plug gage inspection programs in machining and fabrication environments where hole and slot tolerances fall within the 0.501 to 0.625 inch range.

Installation Notes

Plug gages are handled and used by quality technicians and machinists following standard metrology practices. Store pins in the provided holder and avoid dropping or cross-contaminating sizes. Clean pins and the workpiece bore before gaging to prevent false readings. Verify the certificate of accuracy against your in-house calibration records before placing the set into service.