Spi 29-784-6 Class Zz Plus Plug Gage 0.784 in

Product Description

The SPI 29-784-6 is a Class ZZ Plus plug gage designed for precision bore and hole measurement in machining, manufacturing, and inspection environments. Built from steel, this go/no-go style gage checks whether a drilled, reamed, or bored hole meets the specified 0.784-inch diameter within a 0.0002-inch tolerance. Class ZZ is a commercial-grade tolerance class suited for general production inspection work where tight measurement control is required but master-grade accuracy is not. Machinists, quality technicians, and tool-and-die professionals use this gage as part of standard in-process or final inspection routines.

This plug gage is appropriate for use on production floors, inspection departments, and job shops performing hole quality checks on ferrous and non-ferrous workpieces. It is particularly useful when verifying holes sized to 0.784 inches across a range of applications including fixture assembly, component fit verification, and first-article inspection. The compact, lightweight design at 0.2 pounds makes it easy to handle during repeated measurement cycles.

Key Features

• 0.784-inch nominal measurement diameter for precise hole checking
• Class ZZ Plus tolerance of 0.0002 inches for commercial-grade inspection accuracy
• Steel construction for durability and wear resistance in production environments
• Lightweight at 0.2 pounds for comfortable, repetitive use
• Single-piece package quantity for individual replacement or supplemental tooling needs

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for any inspection setup requiring a Class ZZ commercial-tolerance gage at a 0.784-inch nominal diameter.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store the gage in a protective case away from temperature extremes to maintain dimensional stability. Before use, verify the gage is clean and free of burrs or debris that could affect measurement accuracy. Calibration and periodic re-certification against traceable standards is recommended per your shop quality plan.