Spi 29-776-2 Class Zz Plus Plug Gage 0.776 in

Product Description

The SPI 29-776-2 is a Class ZZ Plus plug gage used to inspect and verify bore diameters in precision machining and manufacturing environments. Designed for go/no-go inspection workflows, this plug gage checks whether a hole or bore meets a specified diameter tolerance. The nominal measurement diameter is 0.776 inches, with a tolerance of 0.0002 inches, making it suitable for applications that demand close dimensional control. The steel construction provides durability and dimensional stability under repeated use. Metrology technicians, machinists, and quality control inspectors are the primary users of this type of instrument.

This plug gage is used in machine shops, manufacturing facilities, and quality inspection departments where bore diameter verification is part of standard incoming, in-process, or final inspection procedures. Class ZZ Plus gages are appropriate for general-purpose inspection of production parts where consistent dimensional compliance must be confirmed. The compact size and straightforward design make this gage practical for bench or floor use across a range of industrial applications.

Key Features

• Nominal measurement diameter of 0.776 inches for precise bore inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus classification requirements
• Steel construction for durability and long service life under regular use
• Go/no-go plug gage format supports fast, repeatable pass/fail inspection
• Compact form factor suitable for bench-top and floor inspection environments

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for use in standard go/no-go bore inspection applications where a 0.776-inch nominal diameter and 0.0002-inch tolerance are required.

Installation Notes

Plug gages are handled and used by metrology technicians and quality inspection personnel, not installed in the traditional sense. Store the gage in a protective case away from moisture and debris to maintain dimensional integrity. Clean the gage and the bore being measured before use to prevent false readings. Do not force the gage through a bore, as this can damage both the gage and the part being inspected.