Spi 29-995-8 Class Zz Plus Plug Gage 0.995 in

Product Description

The SPI 29-995-8 is a Class ZZ Plus plug gage designed for precise go/no-go dimensional inspection of bored holes and machined openings at a nominal diameter of 0.995 inches. Built to Class ZZ tolerance standards with a tolerance of 0.0002 inches, this gage is used to verify that a hole falls within acceptable dimensional limits during production or incoming inspection. The steel construction provides durability under repeated use in shop-floor conditions. Machinists, quality control technicians, and toolroom professionals rely on this type of gage for fast, reliable dimensional verification without requiring measurement instruments or calculations at the point of check.

Class ZZ plug gages are standard tools in machine shops, manufacturing facilities, and inspection departments. This gage is suited for checking holes produced by drilling, reaming, boring, or honing where a nominal diameter of 0.995 inches must be confirmed to print tolerance. It fits into standard gage handle systems and is appropriate for both production-floor spot checks and formal incoming or final inspection routines in light to medium manufacturing environments.

Key Features

• Nominal diameter of 0.995 inches for direct hole verification at that dimension
• Class ZZ Plus tolerance of 0.0002 inches for accurate go/no-go inspection
• Steel construction for wear resistance and dimensional stability under repeated use
• Compatible with standard plug gage handles used in shop and inspection environments
• Single-piece package quantity suitable for individual toolroom or inspection station use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for any application requiring Class ZZ go/no-go hole inspection at a nominal diameter of 0.995 inches. Compatible with standard gage handle systems that accept plug gage blanks of the appropriate shank size.

Installation Notes

Plug gages should be installed and used by qualified machinists or inspection personnel familiar with go/no-go gaging procedures. Clean the gage and the bore being checked before use to prevent false readings from chips or contaminants. Do not force the gage into a hole; excessive force can damage the gage or the workpiece and will produce unreliable results. Store the gage in a protective case away from other tooling to prevent nicking or corrosion of the gaging surface.