Spi 29-340-7 Class Zz Plus Plug Gage 0.34 Inch

Product Description

The SPI 29-340-7 is a Class ZZ Plus plug gage designed to verify the internal diameter of bored, drilled, or reamed holes with a nominal size of 0.34 inches. Manufactured from steel, this go/no-go style gage provides a tolerance of 0.0002 inches, meeting Class ZZ Plus accuracy standards used in quality control and inspection applications. The 29-340-7 is a hand-held precision tool used by machinists, quality technicians, and tool-and-die professionals to confirm that a hole falls within an acceptable dimensional range before downstream assembly or finishing operations proceed.

This plug gage is suited for use in machine shops, manufacturing facilities, and precision fabrication environments where hole diameter verification is a routine part of process control. It is appropriate for both production-floor inspection and incoming-material verification. The 0.34-inch nominal diameter makes it a common size for applications involving threaded inserts, bushings, pins, and similar components that require tight hole-tolerance compliance.

Key Features

• Class ZZ Plus tolerance rating at 0.0002 inches for precision dimensional inspection
• Nominal measurement diameter of 0.34 inches
• Steel construction for durability and dimensional stability during repeated use
• Lightweight at 0.2 pounds for comfortable hand-held use during inspection
• Single-piece packaging suitable for individual replacement or addition to an inspection kit

Compatibility

Designed as an OEM-style replacement or standard addition for use with 0.34-inch nominal diameter hole inspection requirements in precision machining and quality control environments.

Installation Notes

Plug gages are handled and used by quality technicians or machinists and require no permanent installation. Store the gage in a clean, dry location away from abrasive surfaces to prevent wear on the precision-ground surfaces. Handle with care and avoid dropping, as impact can alter the ground diameter and affect measurement accuracy. Calibrate or verify the gage against a traceable standard on a schedule consistent with your facility quality management plan.