Spi 29-044-5 Class Zz Plus Plug Gage 0.044 in Dia

Product Description

The SPI 29-044-5 is a Class ZZ Plus plug gage designed for precision bore and hole inspection in machining, manufacturing, and quality control environments. It measures an exact nominal diameter of 0.044 inches with a tolerance of 0.0002 inches, making it appropriate for close-tolerance go/no-go verification work. The steel construction provides durability for repeated use on the shop floor or inspection bench. Machinists, quality technicians, and tool-and-die professionals use this type of gage to verify that drilled, reamed, or punched holes meet dimensional specifications before parts advance through production.

This plug gage is suited for inspection of small-diameter holes in precision parts across industries including aerospace, automotive, electronics, and general metalworking. It is used in both production line spot-checking and formal inspection station setups. The Class ZZ Plus classification indicates it meets recognized standards for gage tolerance grades used in workshop and general inspection applications where tighter Class Z or ZZ gages are not required.

Key Features

• Nominal measurement diameter of 0.044 inches for small-bore inspection
• Tolerance of 0.0002 inches ensuring reliable go/no-go dimensional verification
• Steel construction for wear resistance and dimensional stability during repeated use
• Class ZZ Plus classification meets standard workshop and general inspection gage grades
• Compact, single-piece form suited for bench or in-line inspection stations

Compatibility

Designed as an OEM-style replacement or direct-use precision measurement tool for any inspection application requiring a 0.044-inch diameter Class ZZ Plus plug gage.

Installation Notes

Plug gages should be handled and stored carefully to protect the precision ground surfaces from nicks, corrosion, and thermal distortion. Clean the gage and the workpiece bore before use to ensure accurate readings. Gages should be periodically calibrated against master standards in accordance with your facility quality plan. Never force a plug gage into a hole; damage to the gage or the workpiece can result from excessive insertion force.