Spi 29-246-6 Class Zz Plus Plug Gage 0.246 Inch

Product Description

The SPI 29-246-6 is a Class ZZ Plus plug gage designed to verify inside diameter dimensions with precision. It measures holes at a nominal diameter of 0.246 inches and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in production and quality-control environments. Constructed from steel, this gage provides the rigidity and wear resistance required for repeatable dimensional checks. Machinists, toolmakers, and quality technicians use plug gages like this one to confirm bore sizes meet specification before assembly or further machining operations proceed.

This gage is intended for use in machine shops, manufacturing facilities, and precision fabrication environments where tight hole tolerances must be verified quickly and reliably. It is well suited for inspecting drilled, reamed, or bored holes in metal, plastic, or composite workpieces. The compact, single-piece plug format makes it easy to integrate into standard inspection routines without specialized fixtures or setups.

Key Features

• Nominal measurement diameter of 0.246 inches for precise bore verification
• Class ZZ Plus tolerance of 0.0002 inches supports accurate go/no-go inspection
• Steel construction provides durability and resistance to wear during repeated use
• Compact plug format integrates easily into standard quality-control workflows
• Single-piece design requires no additional tooling or fixtures for basic inspection tasks

Compatibility

Designed as a Class ZZ Plus plug gage for verifying inside diameters at 0.246 inches nominal, suitable for use in standard go/no-go inspection applications in machining and manufacturing environments.

Installation Notes

Plug gages are handled and used by machinists and quality-control technicians following standard metrology practices. Before use, ensure the gage and workpiece bore are clean and free of chips, burrs, or coolant residue that could affect the measurement. Store the gage properly when not in use to prevent damage to the precision-ground surface. Never force the gage into a hole; if resistance is felt, inspect the bore for obstructions or out-of-tolerance conditions.