Spi 29-038-7 Class Zz Plus Plug Gage 0.038 Inch

Product Description

The SPI 29-038-7 is a Class ZZ Plus plug gage designed for precision go/no-go dimensional inspection of small-diameter holes and bores. It measures a nominal diameter of 0.038 inches with a tolerance of 0.0002 inches, making it suitable for quality control work where tight dimensional verification is required. Constructed from steel, this plug gage delivers the durability and wear resistance needed for repeated use in production or inspection environments. Machinists, tool-and-die makers, and quality technicians use Class ZZ Plus gages to confirm that machined features fall within acceptable dimensional limits.

This plug gage is used in precision machining, toolroom inspection, and manufacturing quality assurance applications. It is well suited for verifying small drilled or reamed holes in metal components across aerospace, automotive, medical device, and general industrial manufacturing settings. The compact form factor is appropriate for bench inspection stations and incoming inspection routines where consistent, repeatable measurement of small-diameter features is critical.

Key Features

• Nominal diameter of 0.038 inches for inspection of small precision bores
• Class ZZ Plus tolerance of 0.0002 inches for reliable dimensional verification
• Steel construction for wear resistance and long service life
• Go/no-go style gaging supports fast pass-fail inspection decisions
• Single-piece package quantity suitable for individual toolroom or inspection use

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of holes and bores with a nominal diameter of 0.038 inches in general precision machining and quality control applications.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and toolroom personnel — no power tools or electrical shutoff procedures are required. Keep the gage clean and lightly oiled to prevent corrosion and maintain accuracy. Do not force the gage into an undersized hole, as this can damage the gage or the workpiece. Store in a protective case away from abrasive debris to preserve the ground surface finish and dimensional integrity.