Spi 22-152-3 Class Zz Plug Gage Set 0.833-0.916 in 84 Pc

Product Description

The SPI 22-152-3 is a Class ZZ plug gage set covering a diameter range of 0.833 to 0.916 inches with a minus tolerance of 0.0002 inches per pin. This 84-piece set is used to verify hole sizes, slot widths, and inter-hole distances with a high degree of dimensional repeatability. Each steel pin is manufactured to NIST-traceable standards, making the set suitable for quality control and inspection workflows where documented accuracy is required. A certificate of accuracy and a pin gage holder are included. Dimensional inspection technicians, machinists, and quality assurance professionals are the primary users of this type of tooling.

This plug gage set is used in production and inspection environments where quick, accurate measurement of drilled, reamed, or bored holes is required. The 84-piece configuration spans a range from 0.833 to 0.916 inches, providing coverage for a wide variety of workpiece features in a single kit. It is appropriate for both incoming material inspection and in-process quality checks across light manufacturing, machining, and precision fabrication settings. The included pin gage holder keeps pins organized and accessible during use.

Key Features

• Class ZZ tolerance rating with 0.0002 inch minus tolerance per pin
• Range of 0.833 to 0.916 inches covered across 84 steel pins
• NIST-traceable certificate of accuracy included with each set
• Suitable for hole size verification, slot width measurement, and NO-GO gaging inspection
• Pin gage holder included for organized storage and field use
• Steel construction for durability in shop and inspection room environments

Compatibility

Designed for use with standard pin gage holders and inspection fixtures that accept pins in the 0.833 to 0.916 inch diameter range. UNSPSC Code: 41111600.

Installation Notes

Plug gages should be handled and stored carefully to prevent damage to lapped pin surfaces. Clean pins and the workpiece hole before gaging to avoid false readings caused by debris or coolant residue. Do not force pins into undersized holes, as this can damage the pin and alter its calibrated diameter. Recalibration against NIST-traceable standards is recommended periodically or after any suspected impact or damage.