Spi 22-149-9 Class Zz Plug Gage Set 0.501-0.625 in 125 Pc

Product Description

The SPI 22-149-9 is a 125-piece Class ZZ plug gage set designed for precise measurement of hole sizes, slot widths, and hole-to-hole distances in production and inspection environments. The set covers a diameter range of 0.501 to 0.625 inches with a minus tolerance of 0.0002 inches per NIST-traceable standards. Each pin is manufactured from steel to resist wear during repeated use. A Certificate of Accuracy with NIST traceability and a pin gage holder are included with the set. Dimensional verification, NO-GO gaging inspection, and layout work are all supported applications. Licensed machinists, quality control inspectors, and toolroom technicians are the primary users of this set.

This plug gage set is suited for dimensional inspection tasks in manufacturing facilities, machine shops, and toolrooms where quick, accurate hole measurement is required. The 125-piece configuration covers the 0.501 to 0.625 inch range in close increments, supporting both go and NO-GO inspection workflows. The included pin gage holder organizes the pins for bench use and simplifies retrieval during production inspection. Steel construction holds up to the demands of shop-floor measurement environments.

Key Features

• Class ZZ tolerance rating with NIST-traceable Certificate of Accuracy included
• Minus tolerance of 0.0002 inches per pin for precise dimensional verification
• 125-piece set covers 0.501 to 0.625 inches diameter range
• Steel pin construction for durability in production and toolroom use
• Supports hole sizing, slot width measurement, hole-distance calculation, and NO-GO gaging inspection
• Pin gage holder included for organized bench storage and retrieval

Compatibility

Designed as a standard Class ZZ plug gage set for use in production inspection, quality control, and toolroom dimensional measurement applications requiring coverage in the 0.501 to 0.625 inch diameter range.

Installation Notes

Plug gages are precision instruments and should be handled by qualified metrology or toolroom personnel. Clean all pins and the workpiece bore before use to prevent contamination errors. Store pins in the provided holder when not in use to protect against nicks and corrosion. Do not force a pin into a bore that resists entry, as this can damage the pin or distort the measurement.