Spi 19-379-7 Class Zz Minus Plug Pin Gage 0.379 in

Product Description

The SPI 19-379-7 is a Class ZZ minus plug pin gage with a 0.379-inch nominal diameter, designed for go/no-go inspection of machined bores and holes. The minus tolerance designation means the gage is manufactured to the low side of the tolerance band, consistent with Class ZZ standards for general-purpose inspection. With a tolerance of 0.0002 inches, it provides reliable dimensional verification in production and quality-control environments. The steel construction delivers the hardness and wear resistance required for repetitive gauging tasks on the shop floor. This type of gage is used by machinists, toolmakers, and quality technicians.

Class ZZ plug pin gages at the 0.379-inch diameter are suited for inspection of drilled, reamed, or bored holes in manufacturing and fabrication settings. They are commonly used in general metalworking, job shops, and production facilities where accurate hole-size verification is required before assembly or downstream operations. The minus designation makes this gage appropriate for checking that a hole meets its minimum acceptable size.

Key Features

• Class ZZ minus tolerance for general-purpose hole inspection
• 0.379-inch nominal diameter for precise bore gauging
• Tolerance of 0.0002 inches for reliable dimensional control
• Steel construction for durability and wear resistance in production environments
• Single-piece unit ready for immediate use in go/no-go inspection routines

Compatibility

Designed as a general-purpose Class ZZ minus plug gage suitable for inspecting holes with a nominal diameter of 0.379 inches in standard metalworking and manufacturing inspection applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality-control technicians following standard metrology practices. Clean the gage and the bore being inspected before use to prevent debris from affecting measurement accuracy. Store the gage in its protective case when not in use to prevent damage to the gauging surface. Periodic recalibration against traceable standards is recommended to maintain measurement integrity over time.