Spi 29-654-1 Class Zz Plus Plug Gage 0.654 Inch

Product Description

The SPI 29-654-1 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored holes and machined features at a nominal diameter of 0.654 inches. Built from steel, this gage holds a tolerance of 0.0002 inches (0.0051 mm), meeting the requirements of Class ZZ Plus gage standards. It is used by machinists, tool-and-die makers, and quality control technicians to verify that interior bore dimensions fall within specified limits. At 0.2 pounds, it is lightweight and easy to handle during repetitive inspection operations on the shop floor or in the inspection room.

This plug gage is suited for inspection work in manufacturing and machining environments where precise hole diameter verification is required. It is appropriate for use on drilled, reamed, or bored holes in metal, plastic, or composite workpieces. Class ZZ Plus gages are commonly used in general-purpose inspection where tighter Class Z or ZZ tolerances are not required but reliable go/no-go acceptance criteria still apply. Single-piece packaging makes it straightforward to add to an existing gage inventory.

Key Features

• Nominal measurement diameter of 0.654 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches (0.0051 mm) for reliable go/no-go gauging
• Steel construction for durability and dimensional stability under shop conditions
• Lightweight at 0.2 pounds for comfortable one-handed use during repeated checks
• Single-piece packaging suitable for individual tool-crib or bench-top stocking

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for go/no-go inspection of holes with a nominal diameter of 0.654 inches in general manufacturing and machining applications.

Installation Notes

Plug gages are used by machinists and quality control personnel and require no permanent installation. Before use, clean the gage and the workpiece bore with a lint-free cloth to remove chips, coolant, and debris that could affect the reading. Handle the gage carefully to avoid drops or impacts that can alter dimensional accuracy. Gages should be periodically re-calibrated in accordance with your facility's gage calibration program and applicable ASME B89 standards.