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The SPI 19-611-3 is a Class ZZ minus plug pin gage with a 0.611-inch nominal diameter, manufactured from steel for reliable dimensional inspection work. It is used to verify hole sizes and bore diameters to tight tolerances, with a minus tolerance of 0.0002 inches ensuring the gage stays within the lower boundary of the specified dimension. This tool is a standard choice for quality control technicians, machinists, and precision measurement professionals performing go/no-go inspection tasks in manufacturing and fabrication environments.
This plug gage is suited for inspection of drilled, reamed, or bored holes in production and job-shop settings. Class ZZ gages are commonly applied in less critical or general-purpose inspection work where tolerance requirements are moderate. The 0.611-inch diameter targets a specific nominal hole size, making this gage appropriate for incoming inspection, in-process quality checks, and final verification of machined components.
Designed as a general-purpose plug pin gage for verifying 0.611-inch nominal diameter holes in machined parts and components across a range of manufacturing applications.
Plug pin gages are handled and used by quality control technicians and machinists. Store the gage in a clean, dry environment and handle with care to prevent surface damage that could affect measurement accuracy. Do not force the gage into a hole; apply only light, consistent hand pressure during inspection. Clean the gage and the bore being inspected before use to ensure accurate readings.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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