Spi 22-176-2 Class Zz Plug Gage Set 84 Piece

Product Description

The SPI 22-176-2 is a Class ZZ plug gage set covering a measurement range of 0.833 to 0.916 inches. The set includes 84 steel pin gages calibrated to a plus tolerance of 0.0002 inches, making it suitable for precise hole inspection and dimensional verification in production and quality control environments. Each gage is NIST traceable and ships with a Certificate of Accuracy. Licensed metrology technicians, machinists, and quality inspectors use this set to verify hole sizes, slot widths, and center-to-center distances quickly and reliably without the need for electronic measurement instruments.

This plug gage set is used in manufacturing, machine shops, and inspection departments where hole diameter verification is a routine task. The 0.833 to 0.916 inch range makes it well suited for medium-bore inspection work on machined components. The set supports GO gaging inspection applications, allowing technicians to confirm whether a hole or slot falls within acceptable dimensional limits. The included pin gage holder keeps individual gages organized and protected between uses, supporting efficient workflow on the shop floor or at an inspection station.

Key Features

• Class ZZ tolerance classification with a plus tolerance of 0.0002 inches for precision inspection work
• Measurement range of 0.833 to 0.916 inches covering medium-bore hole sizes
• 84-piece set providing incremental coverage across the full range
• Steel construction for durability and dimensional stability under shop conditions
• NIST traceable Certificate of Accuracy included with each set
• Supports GO gaging inspection, hole size measurement, slot width measurement, and distance-between-holes calculation

Compatibility

Designed as a standard Class ZZ plug gage set for use in general machined-component inspection applications where ANSI pin gage standards apply.

Installation Notes

Plug gages are handled and used by quality inspectors and machinists; no installation in the mechanical sense is required. Store gages in the provided holder and keep them clean and lightly oiled to prevent corrosion and dimensional drift. Do not force a gage into a hole that offers significant resistance, as this can damage both the gage and the workpiece. Follow your facility's gage calibration interval procedures to maintain NIST traceability.