Spi 29-529-5 Class Zz Plus Plug Gage 0.529 in Dia

Product Description

The SPI 29-529-5 is a Class ZZ Plus plug gage machined to a nominal diameter of 0.529 inches with a tolerance of 0.0002 inches. Plug gages of this class are used to verify that drilled, reamed, or bored holes conform to specified dimensional limits. The Class ZZ designation indicates a tolerance grade suited for production go/no-go inspection of average-tolerance workpieces. Constructed from steel, this gage is a standard single-end inspection tool used by machinists, quality technicians, and tool room personnel on the shop floor or in an inspection department.

This plug gage is appropriate for inspecting hole diameters in metal fabrication, machining, and general manufacturing environments. It is suited for use in both job shop and production settings where hole acceptance criteria must be verified against a known dimensional standard. The 0.529-inch diameter targets precision hole inspection at a size common in mechanical assembly and tooling applications.

Key Features

• Nominal measurement diameter of 0.529 inches for direct hole inspection
• Class ZZ Plus tolerance of 0.0002 inches ensures consistent dimensional verification
• Steel construction provides durability and wear resistance in production environments
• Single-piece packaging suitable for individual replacement or addition to a gage inventory
• Compact and lightweight at 0.2 pounds for easy handling during inspection

Compatibility

Designed as an OEM-style replacement or supplemental gage for use in standard plug gage handle sets accepting 0.529-inch Class ZZ Plus gage members.

Installation Notes

Plug gages are installed and used by machinists or quality control technicians and do not require power tools or electrical isolation. Before use, clean both the gage and the workpiece bore to remove chips, coolant, and debris that could affect measurement accuracy. Do not force the gage into the bore; excessive insertion force can damage the gage land or distort the workpiece. Store the gage in a protective case away from temperature extremes to maintain dimensional stability.