Spi 29-027-0 Class Zz Plus Plug Gage 0.027 in Dia

Product Description

The SPI 29-027-0 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a nominal size of 0.027 inches. It holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in precision machining, tooling, and quality control environments. The gage is constructed from steel for dimensional stability and wear resistance. Machinists, toolmakers, and quality technicians use this type of gage to confirm that drilled, reamed, or punched holes fall within specified limits without relying on measurement instruments that require calibration reads.

This plug gage is intended for use in shop-floor and inspection-room applications where small-diameter hole verification is required. At 0.027 inches, this is a very small diameter gage suited for fine-tolerance work in precision component manufacturing, instrument fabrication, and tooling verification. It is a single-piece gage supplied in a quantity of one per package, making it a straightforward replacement or addition to an existing gage set.

Key Features

• Nominal diameter of 0.027 inches for small-bore hole inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for precision go/no-go gauging
• Steel construction for durability and dimensional stability under repeated use
• Compact, single-piece design suited for fine-tolerance inspection tasks
• Individual unit packaging with a minimum order quantity of one

Compatibility

Designed as an OEM-style replacement or supplemental gage for use in standard plug gage sets and inspection tooling requiring a 0.027-inch nominal diameter Class ZZ Plus gage.

Installation Notes

Plug gages are handled and stored by quality technicians and toolmakers following standard metrology practices. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel body. Do not force the gage through an undersized hole, as this will damage the gage and invalidate its tolerance class. Follow your facility's gage calibration and storage procedures to maintain measurement integrity.