Spi 29-395-1 Class Zz Plus Plug Gage 0.395 in

Product Description

The SPI 29-395-1 is a Class ZZ Plus plug gage designed for precision hole measurement in machine shops, manufacturing facilities, and quality-control environments. It measures a nominal diameter of 0.395 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional verification is required. The gage body is constructed from steel for durability and resistance to wear during repeated use. Machinists, tool-and-die makers, and quality technicians use Class ZZ plug gages as a cost-effective standard for production inspection of drilled, reamed, or bored holes.

This plug gage is suited for incoming inspection, in-process quality checks, and final-part verification on production floors handling mid-tolerance work. The 0.395-inch diameter targets a specific bore size commonly encountered in general machining and light manufacturing applications. At 0.2 pounds, the gage is lightweight and easy to handle during repetitive inspection cycles. It ships in a package quantity of one, making it straightforward to requisition as a direct replacement or supplemental inspection tool.

Key Features

• Class ZZ Plus tolerance grade at 0.0002 inches for reliable go/no-go inspection
• 0.395-inch nominal measurement diameter in a single ready-to-use gage
• Steel construction for wear resistance and long service life
• Lightweight at 0.2 pounds for comfortable, high-repetition use
• Single-piece package quantity for straightforward procurement

Compatibility

Designed as an OEM-style precision inspection gage for verifying 0.395-inch diameter bores in general machining, manufacturing, and quality-control applications.

Installation Notes

Plug gages are handled and used by machinists and quality-control technicians following standard metrology practices. Store the gage in a clean, dry environment away from coolants and abrasive debris to preserve gage tolerance. Clean the gage and the bore to be checked before each measurement to avoid false readings caused by chips or contamination. Handle with care to prevent drops, which can alter the gage surface and invalidate its tolerance class.