Spi 29-465-2 Class Zz Plus Plug Gage 0.465 Inch

Product Description

The SPI 29-465-2 is a Class ZZ Plus plug gage used to verify the dimensional accuracy of drilled, reamed, or bored holes in machined workpieces. It measures a nominal diameter of 0.465 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in production and quality control environments. The steel construction provides durability through repeated use in shop floor conditions. Machinists, tool and die makers, and quality technicians use plug gages like this one to confirm that hole diameters meet drawing specifications before parts advance to the next stage of manufacturing.

This gage is intended for use in precision inspection applications where hole diameter conformance must be confirmed to close tolerances. Class ZZ Plus gages are typically used in less demanding tolerance applications compared to Class Z or Class X gages, making them appropriate for general production inspection work rather than high-precision or master-gage applications. The 0.465-inch diameter range fits common drilled or reamed hole sizes found in light manufacturing and general machining operations.

Key Features

• Nominal measurement diameter of 0.465 inches for precise hole inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for production-level go/no-go gauging
• Steel construction for wear resistance and dimensional stability
• Single-piece design suitable for individual hole diameter verification
• Compact and lightweight at 0.2 pounds for easy handling at the point of inspection

Compatibility

Designed as an OEM-style plug gage for general precision inspection use wherever a 0.465-inch nominal hole diameter must be verified to Class ZZ Plus tolerance standards.

Installation Notes

Plug gages are used by quality control technicians and machinists and require no permanent installation. Before use, clean both the gage and the workpiece bore to remove chips, oil, or debris that could affect measurement accuracy. Do not force the gage into a hole; if resistance is encountered, the bore may be undersized or contain burrs requiring attention. Store the gage in a protective case away from abrasive materials to preserve its calibrated surface.