Spi 19-595-8 Class Zz Minus Plug Pin Gage 0.595 in

Product Description

The SPI 19-595-8 is a Class ZZ minus plug pin gage machined from steel for use in dimensional inspection and quality control applications. It measures 0.595 inches in diameter and carries a minus tolerance of 0.000200 inches, meaning the gage is manufactured to the low side of the nominal diameter. Plug pin gages of this type are used to verify bore diameters, hole sizes, and feature openings against specified tolerances. Machinists, quality technicians, and tool room professionals use these gages as part of go/no-go inspection routines on production and prototype workpieces.

Class ZZ is the most widely used tolerance grade for plug gages in general inspection work, suitable for checking holes in the mid-tolerance range where high-precision master-grade gages are not required. The 19-595-8 is appropriate for shop-floor and inspection-bench use in manufacturing, fabrication, and machining environments. It fits into standard gage handle holders for ease of use during repetitive checks.

Key Features

• 0.595 inch nominal diameter for direct bore and hole inspection
• Class ZZ minus tolerance of 0.000200 inches for general-purpose inspection work
• Steel construction for durability in shop-floor environments
• Minus designation indicates gage is held to the low side of nominal diameter
• Compatible with standard plug gage handles for single-handed operation

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for general inspection applications requiring a 0.595 inch diameter Class ZZ minus gage.

Installation Notes

Plug pin gages are handled and used by quality control technicians and machinists — no power tools or utility shutoffs are required. Insert the gage into a standard gage handle holder before use to ensure safe, accurate handling during inspection. Keep the gage clean and lightly oiled when stored to prevent corrosion and preserve dimensional accuracy. Do not force the gage into an undersized bore, as this can damage both the gage and the workpiece.