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The SPI 19-606-3 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and inspection work. It measures a nominal diameter of 0.606 inches with a minus tolerance of 0.0002 inches, placing it within Class ZZ standards for go/no-go dimensional checking. Constructed from steel, this pin gage is suited for shop-floor and quality-control environments where consistent, repeatable measurements are required. Machinists, toolmakers, and quality inspectors use this type of gage to confirm that drilled, reamed, or bored holes fall within specified dimensional limits.
This pin gage is appropriate for use in manufacturing facilities, machine shops, and inspection departments handling precision components. It is typically applied to production workflows where hole diameter verification is required before parts advance to the next stage of assembly. The 0.606-inch diameter makes it a specific-size instrument used when that nominal dimension is called out on engineering drawings or inspection plans.
Designed as a standard Class ZZ minus plug pin gage for use in general precision inspection applications where a 0.606-inch nominal bore diameter must be verified.
Pin gages are handled and used by machinists, toolmakers, and quality technicians following standard metrology practices. Keep the gage clean and lightly oiled when stored to prevent corrosion. Handle with care to avoid dropping or contact with abrasive surfaces, as damage to the gage surface will affect measurement accuracy. Allow the gage and workpiece to reach the same ambient temperature before use to eliminate thermal expansion errors.
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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