Spi 22-173-9 Class Zz Plug Gage Set 0.501-0.625 in 125 Pc

Product Description

The SPI 22-173-9 is a 125-piece Class ZZ plug gage set designed for precise measurement of hole sizes, slot widths, and center-to-center distances between holes. The set covers a diameter range of 0.501 to 0.625 inches with a plus tolerance of 0.000200 inches (0.0002 mm), meeting Class ZZ specifications for GO gaging inspection. Gages are constructed from steel for durability and dimensional stability under shop conditions. A Certificate of Accuracy with NIST traceability and a pin gage holder are included. This set is suited for quality control technicians, machinists, and metrology personnel who require reliable, repeatable dimensional verification.

The 22-173-9 is applied in production inspection and quality assurance environments where hole conformance must be verified quickly and accurately. Typical use cases include verifying drilled or reamed hole diameters, checking slot widths to drawing tolerance, and calculating distances between hole features. The included pin gage holder keeps individual gages organized and accessible on the shop floor or in the inspection lab. The NIST-traceable certificate supports ISO and AS9100 quality documentation requirements.

Key Features

• 125-piece set covering 0.501 to 0.625 inches diameter range
• Class ZZ tolerance of plus 0.000200 inches for GO gaging inspection
• Steel construction for dimensional stability and wear resistance
• NIST-traceable Certificate of Accuracy included for quality documentation
• Pin gage holder included for organized storage and job-site access
• Supports quick measurement of hole sizes, slot widths, and hole spacing

Compatibility

Designed as an OEM-style Class ZZ plug gage set for use in general metrology, production inspection, and quality control applications requiring hole and slot measurement in the 0.501 to 0.625 inch diameter range.

Installation Notes

Plug gages are handled and applied by quality technicians and machinists - no power tools or utility shutoff is required. Keep gages clean and lightly oiled when stored to prevent corrosion and maintain dimensional accuracy. Do not force a gage into an undersized hole, as this can damage the gage or alter its calibration. Refer to the included NIST-traceable certificate and maintain calibration records per your facility quality management system.