Spi 29-737-4 Class Zz Plus Plug Gage 0.737 in Dia

Product Description

The SPI 29-737-4 is a Class ZZ Plus plug gage designed to verify bore and hole diameters with a nominal measurement of 0.737 inches. Built to Class ZZ Plus tolerance standards, it holds a dimensional tolerance of 0.0002 inches (0.0002 mm), making it suited for inspection and quality control applications where consistent bore verification is required. The gage body is constructed from steel for durability under repeated use. Machinists, toolroom technicians, and quality control inspectors use this type of plug gage to confirm that drilled, reamed, or bored holes fall within specified dimensional limits.

This plug gage is used in machine shops, manufacturing facilities, and toolrooms for go/no-go style bore inspection or direct diameter verification. It is appropriate for use on ferrous and non-ferrous workpieces where a 0.737-inch nominal bore diameter must be confirmed. Typical applications include incoming inspection, in-process quality checks, and final part verification on production runs. The compact form factor and steel construction make it practical for bench use or point-of-operation inspection.

Key Features

• Nominal measurement diameter of 0.737 inches for direct bore verification
• Class ZZ Plus tolerance of 0.0002 inches ensures reliable dimensional inspection
• Steel construction provides wear resistance and dimensional stability under regular use
• Lightweight at 0.2 pounds for easy single-hand handling during inspection
• Single-piece packaging suitable for individual toolroom or inspection station use

Compatibility

Designed as a standard Class ZZ Plus plug gage for use in any inspection or quality control application requiring bore diameter verification at 0.737 inches nominal.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians. Clean both the gage and the bore before use to prevent debris from affecting measurement accuracy. Do not force the gage into an undersized bore, as this can cause galling and damage the gage surface. Store in a protective case away from other tooling to preserve the calibrated surface finish.