Spi 29-348-0 Class Zz Plus Plug Gage 0.348 in Dia

Product Description

The SPI 29-348-0 is a Class ZZ Plus plug gage used to verify bore diameters with precision in industrial and manufacturing environments. It measures a nominal diameter of 0.348 inches and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional control is required. The gage is constructed from steel for durability and resistance to wear during routine inspection use. Machinists, quality control technicians, and toolroom professionals use plug gages like the 29-348-0 to confirm that drilled, reamed, or bored holes meet specified dimensional limits.

This plug gage is suited for use in machine shops, toolrooms, and quality inspection stations where hole diameter verification is part of standard process control. It is appropriate for both incoming inspection of raw materials and in-process verification on machined components. The Class ZZ Plus designation places this gage in a category intended for production and inspection of commercial-tolerance work, where consistent, repeatable measurement is essential for part conformance.

Key Features

• 0.348 inch nominal measurement diameter for precise bore verification
• 0.0002 inch tolerance meets Class ZZ Plus gage standards
• Steel construction provides durability and wear resistance in production environments
• Compact form factor suited for bench or in-process inspection use
• Single-piece package ready for immediate use upon receipt

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for any application requiring go/no-go inspection of 0.348 inch nominal bore diameters in a Class ZZ Plus tolerance range.

Installation Notes

Plug gages are handled and used by quality technicians and machinists in accordance with standard metrology practices. Before use, clean the gage and the bore being inspected to remove chips, coolant, and debris that could affect measurement accuracy. Do not force the gage into a bore — excessive force can damage the gage land and introduce measurement error. Store the gage in a protected case away from other tools to prevent surface damage that would affect calibration integrity.