Spi 29-759-8 Class Zz Plus Plug Gage 0.759 Inch

Product Description

The SPI 29-759-8 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored or drilled holes with a nominal diameter of 0.759 inches. It holds a tolerance of 0.0002 inches, making it suitable for production floor verification and quality control inspection tasks where repeatable, traceable measurement is required. Constructed from steel, this gage delivers the durability and wear resistance expected in industrial inspection environments. Machinists, tool room technicians, and quality assurance personnel use this type of gage to confirm hole diameters fall within print specifications before parts advance through the production process.

This plug gage is used in machine shops, fabrication facilities, and manufacturing environments where precise hole diameter verification is part of the standard inspection workflow. It is appropriate for both incoming material inspection and in-process quality checks on machined components. Class ZZ Plus gages are commonly applied where moderate tolerance control is required, such as general-purpose production parts rather than high-precision or gauge-block-grade work. The single-end design and compact form factor make it straightforward to handle at the bench or on the floor.

Key Features

• Nominal diameter of 0.759 inches for direct go/no-go hole inspection
• Class ZZ Plus tolerance rating at 0.0002 inches for reliable production-floor accuracy
• Steel construction for wear resistance and long service life
• Lightweight at 0.2 pounds, easy to handle during repeated inspections
• Single-unit packaging suits individual bench or field use

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of holes with a 0.759-inch nominal diameter in general industrial and machining applications.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and inspection personnel — no installation in the traditional sense applies. Store the gage in its case when not in use to prevent nicks or surface damage that would affect accuracy. Clean the gage and the part bore before use to eliminate chips or debris that could produce false readings. Periodic recalibration against NIST-traceable standards is recommended to maintain measurement integrity over time.