Spi 29-315-9 Class Zz Plus Plug Gage 0.315 in

Product Description

The SPI 29-315-9 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a high degree of dimensional accuracy. It measures a nominal diameter of 0.315 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in precision machining, fabrication, and quality control environments. Constructed from steel, this gage is designed for repeated use in shop-floor and inspection-room settings. Machinists, toolmakers, and quality technicians rely on plug gages like this one to confirm that drilled, reamed, or bored holes fall within acceptable dimensional limits before assembly or further processing.

Class ZZ Plus plug gages are typically used in light production and inspection applications where standard tolerance verification is required. This gage is suited for checking hole sizes on machined parts, fixtures, and components in manufacturing environments. Its compact size and single-piece construction make it easy to handle during routine dimensional inspection tasks.

Key Features

• Nominal measurement diameter of 0.315 inches for precise hole inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus gage accuracy standards
• Steel construction provides durability for repeated shop-floor use
• Compact, single-piece design suited for go/no-go inspection workflows
• Package quantity of 1 for individual gage procurement

Compatibility

Designed as an OEM-style inspection tool for verifying 0.315-inch nominal bore and hole diameters in standard machining and quality control applications.

Installation Notes

Plug gages are handled and used by machinists, toolmakers, and quality control technicians. Before use, clean the gage and the workpiece bore to remove chips, coolant, and debris that could affect measurement accuracy. Do not force the gage into a hole; excessive insertion force can damage both the gage and the part. Store the gage in its protective case or sleeve when not in use to preserve surface finish and dimensional integrity.