Spi 22-170-5 Class Zz Plug Gage Set 50 Pc Nist Traceable

Product Description

The SPI 22-170-5 is a 50-piece Class ZZ plug gage set designed for precise inspection of hole sizes, slot widths, and hole-to-hole distances. Covering a diameter range of 0.011 to 0.06 inches with a plus tolerance of 0.0002 inches (0.0002 mm), this set delivers the accuracy required for GO gaging and general inspection work. The gages are manufactured from steel and ship with a Certificate of Accuracy backed by NIST traceability. A pin gage holder is included. Machinists, quality technicians, and tool-and-die professionals rely on sets like this for fast, repeatable dimensional verification on the shop floor or in the inspection lab.

This plug gage set is suited for production inspection and quality control environments where quick, accurate measurement of small bores and slots is required. Typical applications include verifying drilled or reamed hole diameters, checking slot widths on machined components, and calculating distances between holes. The Class ZZ tolerance designation indicates a working-gage grade appropriate for general inspection use rather than master or reference gaging. The set is packaged as a single unit and is ready to use out of the box with the included holder and certificate.

Key Features

• 50-piece set covering 0.011 to 0.06 inches diameter range
• Class ZZ tolerance grade with plus tolerance of 0.0002 inches
• NIST traceable Certificate of Accuracy included
• Steel construction for durability in shop environments
• Pin gage holder included for organized storage and use
• Supports GO gaging inspection, hole sizing, slot width measurement, and hole-distance calculation

Compatibility

Designed as a standard Class ZZ working plug gage set for use with any pin gage holder accepting the included diameter range; compatible with common inspection fixtures and gage blocks used in general machining and quality control applications.

Installation Notes

Plug gages should be handled by quality technicians or machinists familiar with dimensional inspection procedures. Clean the gages and the workpiece bore before use to avoid false readings caused by debris or residual coolant. Store gages in the provided holder when not in use to prevent nicks or corrosion that would affect accuracy. Periodic recalibration against a NIST traceable standard is recommended per your facility quality management program.