Spi 19-949-7 Class Zz Minus Plug Pin Gage 0.949 in

Product Description

The SPI 19-949-7 is a Class ZZ minus plug pin gage machined from steel, designed to verify bore and hole diameters to a nominal size of 0.949 inches. It holds a tolerance of 0.000200 inches, meeting Class ZZ specifications for go/no-go dimensional inspection. Plug pin gages of this type are used in quality control, incoming inspection, and production line verification where accurate hole sizing is critical. Machinists, tool-and-die makers, and quality technicians rely on this style of gage for fast, repeatable pass/fail checks without the need for indicating instruments.

This gage is suited for inspecting drilled, reamed, or bored holes in metal and plastic components across manufacturing, fabrication, and machine shop environments. The minus designation indicates the gage is ground to the low side of the nominal diameter, following standard plug gage practice for go-gage applications. It is appropriate for use on production floors and inspection benches where Class ZZ tolerances meet the required accuracy level for the work being inspected.

Key Features

• Nominal diameter of 0.949 inches for precise bore verification
• Class ZZ minus tolerance of 0.000200 inches for consistent dimensional checking
• Steel construction for durability in shop and inspection environments
• Single-piece packaging suitable for individual replacement or addition to gage sets
• Compact and lightweight at 0.2 pounds for easy bench and floor use

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in any inspection or quality control application requiring verification of a 0.949-inch nominal hole diameter.

Installation Notes

Plug pin gages require no installation in the traditional sense but should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store the gage in a protective case away from other metal tools to avoid contact damage to the precision-ground surface. Verify the gage against a calibrated master ring gage or traceable standard before placing it into service. Follow your shop or facility calibration schedule to maintain measurement traceability.