Spi 19-392-0 Class Zz Minus Plug Pin Gage 0.392 Inch

Product Description

The SPI 19-392-0 is a Class ZZ minus plug pin gage with a nominal diameter of 0.392 inches and a tolerance of 0.000200 inches. It is manufactured from steel and is used to verify bore and hole dimensions by the go/no-go method. Class ZZ gages are the standard working gage class for general inspection of non-critical tolerances in production and quality control environments. Machinists, toolmakers, and quality technicians use pin gages like this one to confirm that drilled, reamed, or bored holes fall within acceptable dimensional limits.

This gage is suited for use in production inspection, incoming quality control, and dimensional verification tasks across machine shops, manufacturing facilities, and tool rooms. The minus designation indicates the gage is ground to the lower end of the nominal diameter, making it appropriate for checking minimum hole size. It is handled as a hand-held inspection instrument and requires no power source or mounting hardware.

Key Features

• Class ZZ tolerance class for general-purpose working gage applications
• Nominal diameter of 0.392 inches for precise hole verification
• Tolerance of 0.000200 inches ensures consistent dimensional accuracy
• Steel construction for durability in production environments
• Minus designation targets the lower boundary of nominal diameter

Compatibility

Designed as an OEM-style working gage for use in standard go/no-go pin gage sets and individual hole inspection applications where Class ZZ minus plug gages are specified.

Installation Notes

Pin gages are inspection instruments and do not require installation. Handle with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in a protective case away from other metal tools to avoid nicks or surface damage that could affect accuracy. Calibrate or verify against a reference standard at regular intervals per your quality management procedures.