Spi 29-849-7 Class Zz Plus Plug Gage 0.849 in

Product Description

The SPI 29-849-7 is a Class ZZ Plus plug gage designed for precision go/no-go inspection of bored, drilled, and reamed holes. Built from steel, it measures a nominal diameter of 0.849 inches with a tolerance of 0.0002 inches, placing it in the Class ZZ Plus accuracy grade suited for production-floor and inspection-room use. Machinists, toolroom technicians, and quality-control inspectors use this gage to verify that hole diameters fall within specified limits, catching out-of-tolerance work before it advances down the line.

This plug gage is suited for dimensional verification in manufacturing and fabrication environments where hole size conformance is critical. Typical applications include incoming inspection, in-process quality checks, and final part acceptance on machined components. It is appropriate for use in job shops, production facilities, and toolrooms handling steel, aluminum, or plastic workpieces where a 0.849-inch nominal diameter is a controlled feature.

Key Features

• Class ZZ Plus tolerance grade at 0.0002 inches for reliable go/no-go inspection
• Nominal measurement diameter of 0.849 inches
• Steel construction for durability and dimensional stability
• Compact form factor at 0.2 pounds for easy single-hand use
• UNSPSC Code 41111600 for streamlined procurement classification

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of holes with a nominal diameter of 0.849 inches across a wide range of machined workpieces and materials.

Installation Notes

Plug gages should be handled and stored by calibration or inspection personnel following established metrology practices. Clean the gage and the workpiece bore before use to prevent contamination from affecting readings. Never force the gage into a hole; damage to the gage or workpiece may result. Periodic recalibration against a traceable standard is recommended to maintain measurement integrity.