Spi 29-460-3 Class Zz Plus Plug Gage 0.46 Inch

Product Description

The SPI 29-460-3 is a Class ZZ Plus plug gage designed for go/no-go inspection of bored holes, drilled passages, and machined features with a nominal diameter of 0.46 inches. Built from steel, this gage provides a tolerance of 0.0002 inches, meeting Class ZZ Plus standards for precision measurement in shop-floor and inspection environments. Machinists, tool-and-die technicians, and quality control inspectors use plug gages like this one to verify that hole dimensions fall within acceptable limits without requiring complex setup or calibration equipment.

This plug gage is suited for use in manufacturing, fabrication, and machine shop environments where quick, repeatable hole-diameter verification is required. It is appropriate for checking holes in metal, plastic, or composite workpieces wherever a 0.46-inch nominal diameter tolerance check is part of the inspection routine. The Class ZZ Plus classification makes it a practical choice for general-purpose inspection work rather than master-gage or laboratory-grade applications.

Key Features

• 0.46-inch nominal diameter for direct hole inspection at that size
• Class ZZ Plus tolerance of 0.0002 inches for reliable go/no-go gauging
• Steel construction for durability in shop-floor use
• Compact and lightweight at 0.2 pounds for easy single-hand operation
• Single-piece unit ready for immediate use without additional setup

Compatibility

Designed as a general-purpose Class ZZ Plus plug gage for inspecting holes with a nominal diameter of 0.46 inches in standard machining and fabrication inspection applications.

Installation Notes

Plug gages are handled and used by machinists or quality control inspectors and require no installation in the traditional sense. Store the gage in a clean, dry case when not in use to prevent corrosion and dimensional drift on the steel surface. Before use, clean both the gage and the workpiece hole to remove chips, coolant, and debris that could affect the measurement result. Do not force the gage into a hole; excessive insertion force can damage the gage surface and produce inaccurate readings.