Spi 19-519-8 Class Zz Minus Plug Pin Gage 0.519 in

Product Description

The SPI 19-519-8 is a Class ZZ minus plug pin gage machined from steel and used to verify bore and hole diameters with high dimensional accuracy. It measures 0.519 inches in diameter and carries a minus tolerance of 0.0002 inches, placing it within the Class ZZ specification for go/no-go inspection work. Pin gages at this tolerance class are standard tools in quality control, machine shops, and precision fabrication environments. The gage provides a direct physical check of a feature diameter, confirming whether a hole or bore falls within the acceptable dimensional range without relying on indirect measurement instruments.

Class ZZ plug pin gages are used in production inspection and incoming quality checks where hole size verification is required. This gage is suited for residential and commercial fabrication shops, toolrooms, and manufacturing QC lines. It is a single-pin gage intended for individual diameter checking at 0.519 inches. Typical applications include checking drilled, reamed, or punched holes in metal, plastic, or composite workpieces where dimensional conformance to print is required.

Key Features

• Class ZZ minus tolerance of 0.0002 inches for reliable go/no-go inspection
• 0.519 inch nominal diameter for direct bore verification
• Steel construction for durability and dimensional stability
• Compact and lightweight at 0.2 pounds for handheld use
• Single-piece design suitable for individual hole checking in production environments

Compatibility

Designed as an OEM-style replacement or direct addition to standard pin gage sets used in quality control and toolroom inspection applications for 0.519 inch diameter feature verification.

Installation Notes

Pin gages are handled and stored by metrology technicians, QC inspectors, and machinists following standard gage handling practices. Keep the gage clean and lightly oiled to prevent corrosion and maintain dimensional accuracy. Do not force the gage into a hole; a correct-size bore should accept a minus plug gage with minimal resistance. Store in a protective case away from temperature extremes to prevent thermal expansion errors during use.