Spi 29-159-1 Class Zz Plus Plug Gage 0.159 in

Product Description

The SPI 29-159-1 is a Class ZZ Plus plug gage used to verify bore diameters with a nominal measurement of 0.159 inches and a tolerance of 0.0002 inches. Plug gages are go/no-go inspection tools used by machinists, quality technicians, and manufacturing professionals to confirm that drilled, reamed, or bored holes meet specified dimensional tolerances. The steel construction provides durability for repeated use in production and inspection environments. At 0.2 pounds, the gage is compact and easy to handle for bench or floor-level inspection work.

This plug gage is suited for small-diameter bore inspection in precision machining, fabrication, and quality control applications. It is appropriate for use in both production floor and metrology lab settings where consistent, reliable diameter verification is required. The Class ZZ Plus tolerance class reflects a general-purpose inspection standard commonly used for checking work tolerances in standard manufacturing environments.

Key Features

• Nominal measurement diameter of 0.159 inches for small-bore inspection
• Tolerance of 0.0002 inches for reliable Class ZZ Plus accuracy
• Steel construction for durability and long service life
• Lightweight at 0.2 pounds for easy single-hand use
• Single-piece package quantity supports individual replacement or kit supplementation

Compatibility

Designed as a general-purpose Class ZZ Plus plug gage for standard bore inspection at 0.159 inches nominal diameter. Suitable for use wherever small-diameter go/no-go gage inspection is required.

Installation Notes

Plug gages should be handled and stored carefully to prevent surface damage that could affect accuracy. Before use, clean the gage and the bore being measured to remove debris, chips, or lubricants that could produce false readings. Gages should be periodically inspected and recalibrated per applicable metrology standards to maintain traceability. Do not force the gage into a bore; excessive insertion force can damage both the gage and the workpiece.