Spi 29-216-9 Class Zz Plus Plug Gage 0.216 Inch

Product Description

The SPI 29-216-9 is a Class ZZ Plus plug gage used to verify the inside diameter of precision bores and holes. Manufactured from steel, this go/no-go style inspection tool checks whether a hole has been machined to the correct size within a defined tolerance. The 29-216-9 measures a nominal diameter of 0.216 inches with a tolerance of 0.0002 inches, making it suited for quality control tasks where tight dimensional accuracy is required. Machinists, tool-and-die technicians, and quality inspection personnel use plug gages as part of standard in-process and final inspection routines on the shop floor or in the inspection room.

Class ZZ Plus plug gages are appropriate for production inspection of non-precision work where the tolerance requirements are less stringent than Class Z or ZZ applications, while still providing reliable pass/fail dimensional verification. This gage is typically used in job shops, manufacturing facilities, and production environments where holes are drilled, reamed, or bored to a 0.216-inch nominal specification. It is used as a handheld inspection tool without requiring a fixture or dedicated measuring stand.

Key Features

• Nominal measurement diameter of 0.216 inches for bore inspection
• Tolerance of 0.0002 inches for consistent, repeatable pass/fail results
• Class ZZ Plus accuracy rating suitable for production inspection applications
• Steel construction for durability and dimensional stability during repeated use
• Compact, lightweight design at 0.2 pounds for easy handheld operation

Compatibility

Designed as an OEM-style plug gage for inspecting bores machined to a 0.216-inch nominal inside diameter in standard production or quality control applications.

Installation Notes

Plug gages are used by machinists and quality inspection technicians and require no installation. Before use, ensure the gage and the workpiece bore are clean and free of chips, coolant, or debris that could affect the measurement. Do not force the gage into the hole, as this can damage both the gage and the workpiece. Store the gage in its case and handle it carefully to preserve its calibration and dimensional accuracy.