Spi 29-041-1 Class Zz Plus Plug Gage 0.041 in

Product Description

The SPI 29-041-1 is a Class ZZ Plus plug gage designed for precise go/no-go inspection of small-diameter bores and holes. Manufactured from steel, this gage measures a nominal diameter of 0.041 inches with a tolerance of 0.0002 inches, making it suitable for tight-tolerance quality control work on the shop floor or in the inspection room. Class ZZ Plus gages are a standard tool in dimensional inspection, used to verify that drilled, reamed, or punched holes meet specified size requirements before parts move to the next stage of production.

This plug gage is used in machine shops, toolrooms, and manufacturing facilities where hole-diameter verification is required. It is well suited for inspecting small-bore features on precision machined components, stampings, and assemblies. Machinists, quality control technicians, and tool and die professionals typically use plug gages of this class for incoming inspection, in-process checking, and final part acceptance.

Key Features

• Nominal measurement diameter of 0.041 inches for small-bore inspection
• Tolerance of 0.0002 inches for tight-tolerance go/no-go verification
• Steel construction for durability and wear resistance in shop environments
• Class ZZ Plus designation meets standard dimensional inspection requirements
• Compact single-piece format for easy handling during inspection tasks

Compatibility

Designed as a standard Class ZZ Plus plug gage for use in any application requiring go/no-go inspection of a 0.041-inch nominal diameter bore or hole.

Installation Notes

Plug gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Before use, verify the gage is clean and free of debris that could affect measurement accuracy. Store the gage in its protective case when not in use to prevent damage to the precision ground surfaces. Periodic recalibration against traceable standards is recommended to maintain accuracy over the service life of the gage.