Spi 22-171-3 Class Zz Plug Gage Set 190 Piece

Product Description

The SPI 22-171-3 is a 190-piece Class ZZ plug gage set designed for precise hole measurement in industrial inspection and quality control applications. The set covers a diameter range of 0.061 to 0.25 inches with a plus tolerance of 0.000200 inches, making it suitable for verifying hole sizes, slot widths, and distances between holes. Gages are manufactured from steel for durability and wear resistance. A Certificate of Accuracy with NIST-traceable calibration and a pin gage holder are included with the set. This tool is a standard choice for machinists, quality technicians, and toolroom professionals who need reliable GO gaging inspection capability.

This plug gage set is used in manufacturing, toolroom, and inspection environments where accurate bore and hole verification is required. The 190-piece range spanning 0.061 to 0.25 inches covers a wide variety of common hole sizes encountered in general metalworking and mechanical assembly. The included pin gage holder keeps pins organized and accessible during use. Typical applications include incoming inspection, in-process quality checks, and final part verification across both job shop and production floor settings.

Key Features

• 190-piece set covering 0.061 to 0.25 inches diameter range
• Class ZZ tolerance of 0.000200 inches (plus tolerance type)
• Steel construction for durability in toolroom and inspection use
• Includes Certificate of Accuracy with NIST-traceable calibration
• Pin gage holder included for organized storage and quick access
• Suitable for GO gaging, hole sizing, slot width measurement, and distance-between-holes calculations

Compatibility

Designed as a general-purpose Class ZZ plug gage set for use in standard GO gaging inspection workflows across a wide range of metalworking and mechanical assembly applications where hole diameters between 0.061 and 0.25 inches require verification.

Installation Notes

Plug gages are typically handled by quality technicians or machinists and require no permanent installation. Store pins in the provided holder and handle with clean, dry hands or lint-free gloves to prevent corrosion and dimensional error from contamination. Verify gage pins against the included NIST-traceable certificate periodically to confirm calibration status. Follow your facility quality management procedures for gage control and calibration intervals.