Spi 29-045-2 Class Zz Plus Plug Gage 0.045 in

Product Description

The SPI 29-045-2 is a Class ZZ Plus plug gage used to verify the diameter of precision bores and holes to a nominal size of 0.045 inches. Built from steel, this go/no-go style gage delivers a tolerance of 0.0002 inches, making it a reliable tool for dimensional inspection in manufacturing, machining, and quality control environments. Machinists, tool-and-die makers, and quality technicians use plug gages like this one to confirm that drilled, reamed, or punched holes meet print specifications before parts advance to the next stage of production.

This gage is suited for inspection of small-diameter features where tight tolerances are critical. Class ZZ Plus gages are typically used in general-purpose inspection of production parts, tooling verification, and incoming material checks. The compact size and steel construction make it practical for bench-level and floor-level inspection tasks across metalworking, aerospace component fabrication, and precision mechanical assembly operations.

Key Features

• Nominal measurement diameter of 0.045 inches for small-bore inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for reliable go/no-go verification
• Steel construction for durability and dimensional stability
• Compact, single-unit package suited for individual technician use
• Designed for dimensional inspection in production and quality control settings

Compatibility

Designed as a general-purpose plug gage for inspecting holes and bores with a nominal diameter of 0.045 inches in standard machining and quality control applications.

Installation Notes

Plug gages are used by machinists and quality control technicians and require no permanent installation. Handle the gage with clean, dry hands or lint-free gloves to prevent contamination and corrosion from skin oils. Store the gage in its protective case when not in use and allow it to reach ambient temperature before use to ensure accurate measurement. Periodic calibration against a certified master is recommended to maintain traceability.