Spi 19-665-9 Class Zz Minus Plug Pin Gage 0.665 in

Product Description

The SPI 19-665-9 is a Class ZZ minus plug pin gage with a 0.665-inch nominal diameter, manufactured from steel for reliable, repeatable dimensional inspection. Class ZZ is the standard tolerance class for go/no-go plug gages used in general-purpose inspection of drilled, reamed, or bored holes. With a tolerance of 0.0002 inches in the minus direction, this gage is designed to check that a hole meets its minimum size requirement. It is used by machinists, quality control inspectors, and tool-and-die technicians on the shop floor or in the inspection room.

This plug gage is suited for general manufacturing inspection environments where hole diameter verification is required on production or finished parts. It is appropriate for use on ferrous and non-ferrous workpieces in both job-shop and production-line settings. The 0.665-inch diameter covers a common bore size found in mechanical assemblies, fixtures, and machined components. A single gage is supplied per package, making it straightforward to add to an existing pin gage set or replace a worn member.

Key Features

• Class ZZ tolerance class for general-purpose go/no-go hole inspection
• Minus tolerance of 0.0002 inches ensures the gage stays within the lower tolerance boundary
• 0.665-inch nominal diameter covers a widely used bore size in machined components
• Steel construction provides durability and wear resistance under regular shop use
• Single-piece packaging allows individual replacement without purchasing a full set

Compatibility

Designed as an OEM-style replacement or addition to standard Class ZZ plug gage sets used in general-purpose dimensional inspection applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality inspectors and do not require power or mechanical installation. Clean the gage and the bore with a lint-free cloth before use to remove chips, oil, or debris that could affect the reading. Handle the gage carefully to avoid drops or impact that can alter calibration. Recalibrate or replace the gage if wear is detected, and store it in a protective case away from other metal tools to prevent surface damage.