Spi 29-047-8 Class Zz Plus Plug Gage 0.047 in Dia

Product Description

The SPI 29-047-8 is a Class ZZ Plus plug gage used to inspect and verify small-diameter bores and holes to a precise dimensional standard. It measures a nominal diameter of 0.047 inches with a tolerance of 0.0002 inches, making it suitable for tight-tolerance inspection work in machining, manufacturing, and assembly environments. Constructed from steel, this go/no-go style gage provides a reliable reference for quality control technicians and machinists who need consistent, repeatable measurement results on small-bore features.

This plug gage is used in precision inspection applications where small-hole dimensional verification is required. Typical use cases include incoming inspection, in-process quality checks, and final part verification on machined components. The 0.047-inch diameter range serves micro-bore inspection tasks common in aerospace, medical device, and general precision manufacturing settings. A licensed machinist, quality inspector, or toolroom technician typically handles this type of gage in a controlled inspection environment.

Key Features

• Class ZZ Plus tolerance classification for small-bore dimensional inspection
• Nominal measurement diameter of 0.047 inches
• Tolerance of 0.0002 inches for tight-tolerance verification
• Steel construction for durability and dimensional stability
• Compact, single-piece design suited for precision toolroom and inspection use

Compatibility

Designed as a go/no-go style Class ZZ Plus plug gage for verifying bores and holes with a nominal diameter of 0.047 inches in standard precision inspection applications.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin contact. Store the gage in its protective case when not in use to maintain dimensional integrity. Do not force the gage into a bore; insertion should require only light hand pressure consistent with the go/no-go method. Periodic cleaning and recalibration against a traceable standard are recommended to ensure ongoing measurement accuracy.