Spi 29-913-1 Class Zz Plus Plug Gage 0.913 in Dia

Product Description

The SPI 29-913-1 is a Class ZZ Plus plug gage designed to verify the internal diameter of holes and bores to a nominal measurement of 0.913 inches. Built from steel, this go/no-go style gage delivers a tolerance of 0.0002 inches, making it suitable for production inspection and quality control applications where tight dimensional verification is required. Machinists, toolmakers, and quality technicians use plug gages like this to confirm that drilled, reamed, or bored features meet drawing specifications before parts move to assembly.

This gage is used in machine shops, manufacturing facilities, and inspection departments where bore diameter must be verified against a defined tolerance. It is appropriate for both incoming inspection of raw stock and final inspection of finished parts. The 0.913-inch nominal diameter targets mid-range bore sizes common in precision mechanical components. At 0.2 pounds, the gage is lightweight and easy to handle during repetitive inspection tasks.

Key Features

• 0.913 inches nominal diameter for direct bore verification
• Class ZZ Plus tolerance of 0.0002 inches for precise dimensional control
• Steel construction for durability and wear resistance in production environments
• Lightweight at 0.2 pounds for comfortable single-hand use
• Single-piece package quantity suitable for individual workstation use

Compatibility

Designed as a direct measurement tool for any bore or hole with a nominal diameter of 0.913 inches where Class ZZ Plus tolerance verification is required.

Installation Notes

Plug gages require no installation but should be handled and stored according to standard gage calibration practices. Clean the gage and the bore being measured before use to prevent debris from affecting readings. Do not force the gage into the bore; excessive insertion force can damage the gage surface or distort the workpiece. Periodic recalibration against certified masters is recommended to maintain measurement traceability.