Spi 29-746-5 Class Zz Plus Plug Gage 0.746 in

Product Description

The SPI 29-746-5 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal size of 0.746 inches. It holds a tolerance of 0.0002 inches, making it appropriate for inspection tasks that require precise go/no-go dimensional verification. Constructed from steel, this gage is a standard tool in quality control and machining environments where consistent measurement of internal diameters is required. Metrology technicians, machinists, and quality inspectors use plug gages like this one to confirm that machined features meet drawing tolerances before parts advance in production.

This gage is suited for use in machine shops, manufacturing facilities, and inspection departments performing in-process or final inspection of bored or drilled features at the 0.746-inch nominal diameter. Class ZZ Plus gages are typically used in general-purpose inspection applications where tighter Class Z or ZZ tolerances are not required. The steel construction resists wear under repeated use in production environments.

Key Features

• Nominal measurement diameter of 0.746 inches for go/no-go bore inspection
• Class ZZ Plus tolerance grade at 0.0002 inches for reliable dimensional verification
• Steel construction for durability and wear resistance in production environments
• Compact and lightweight at 0.2 pounds for easy handling during inspection
• Single-piece package quantity suitable for individual workstation use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for general-purpose bore inspection applications requiring a 0.746-inch nominal diameter at Class ZZ Plus tolerance.

Installation Notes

Plug gages are handled by quality control technicians and machinists and require no permanent installation. Before use, ensure the gage and the part being inspected are at the same ambient temperature to avoid measurement error from thermal expansion. Do not force the gage into the bore; if resistance is encountered, the feature is likely undersized. Store the gage in a protective case when not in use to prevent surface damage that could affect measurement accuracy.