Spi 22-175-4 Class Zz Plug Gage Set 0.751-0.832 in 82 Pc

Product Description

The SPI 22-175-4 is an 82-piece Class ZZ plug gage set designed for precise hole measurement in manufacturing and inspection applications. The set covers a diameter range of 0.751 to 0.832 inches with a plus tolerance of 0.000200 inches, meeting NIST traceable standards for dimensional accuracy. Steel construction provides durability in shop-floor environments. Licensed metrology technicians, machinists, and quality control inspectors use this set to verify hole sizes, slot widths, and center-to-center distances quickly and accurately. Each set ships with a Certificate of Accuracy and a pin gage holder for organized storage and deployment.

This plug gage set is suited for dimensional inspection in precision machining, metal fabrication, and quality assurance environments. It is commonly used for GO gaging inspection workflows where rapid verification of manufactured hole diameters is required. The 82-piece range provides coverage across a 0.081-inch span in fine increments, making it practical for production lines and incoming inspection stations handling close-tolerance components. The included Certificate of Accuracy with NIST traceability supports ISO and AS9100 quality documentation requirements.

Key Features

• Class ZZ tolerance grade with plus tolerance of 0.000200 inches for reliable GO-gage inspection
• NIST traceable Certificate of Accuracy included for quality documentation compliance
• 82-piece set spanning 0.751 to 0.832 inches in fine diameter increments
• Steel construction for wear resistance in production inspection use
• Pin gage holder included for organized storage and quick access
• Suitable for measuring hole sizes, slot widths, and distances between holes

Compatibility

Designed for use with standard pin gage holders and applicable to any precision inspection application requiring Class ZZ plug gages in the 0.751 to 0.832 inch diameter range.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store pins in the provided holder when not in use to protect gage surfaces from nicks and wear. Verify that the work piece and gage are at the same temperature before measuring, as thermal expansion can affect readings at this tolerance class. Inspection personnel should follow facility calibration and traceability procedures in accordance with applicable quality management standards.