Spi 29-330-8 Class Zz Plus Plug Gage 0.33 Inch

Product Description

The SPI 29-330-8 is a Class ZZ Plus plug gage designed for precision hole inspection in machine shop and manufacturing environments. It measures bore diameters at 0.33 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional control is required. Constructed from steel for durability and dimensional stability, this gage is used by machinists, quality technicians, and toolroom professionals to verify hole size conformance to print specifications.

This plug gage is suited for inspection of drilled, reamed, or bored holes in production and toolroom settings. Class ZZ Plus gages are commonly applied in lower-precision inspection applications where economical go/no-go verification is needed. The 0.33-inch diameter makes it a direct-fit inspection tool for holes machined to that nominal dimension. It ships as a single gage unit and is appropriate for bench inspection stations or in-process quality checks on the shop floor.

Key Features

• Class ZZ Plus tolerance class for go/no-go hole inspection
• 0.33-inch nominal diameter measurement range
• 0.0002-inch tolerance for precise dimensional verification
• Steel construction for wear resistance and long service life
• Single-unit package ready for immediate use

Compatibility

Designed for go/no-go inspection of holes with a nominal diameter of 0.33 inches in standard machined components.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians. Clean the gage and the bore thoroughly before use to prevent debris from affecting measurement accuracy. Store the gage in its protective case when not in use to prevent damage to the precision ground surface. Do not force the gage into a hole; excessive insertion force can damage both the gage and the workpiece.