Spi 19-383-9 Class Zz Minus Plug Pin Gage 0.383 in

Product Description

The SPI 19-383-9 is a Class ZZ minus plug pin gage with a nominal diameter of 0.383 inches, manufactured from steel for durability in production and inspection environments. It carries a minus tolerance of 0.0002 inches, making it appropriate for go/no-go gauging applications where close-tolerance hole verification is required. This gage is used by machinists, quality control technicians, and tool room professionals to check bore sizes against dimensional specifications. It provides a reliable, repeatable method for verifying hole diameter in manufactured parts and assemblies.

Class ZZ plug gages are the most widely used grade for general-purpose shop floor inspection. The 19-383-9 is suited for checking drilled, reamed, or bored holes in metal, plastic, or composite workpieces. It is typically used in machine shops, fabrication facilities, and quality inspection departments where dimensional verification of production parts is part of standard workflow.

Key Features

• Nominal diameter of 0.383 inches for precise hole verification
• Class ZZ minus tolerance of 0.0002 inches for general shop floor use
• Steel construction for wear resistance and dimensional stability
• Single-piece plug gage format for straightforward go/no-go inspection
• Compact and lightweight at 0.2 pounds for easy handling

Compatibility

Designed as an OEM-style replacement or standard addition to plug gage sets used for verifying 0.383-inch nominal diameter bores in general manufacturing and quality inspection applications.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion and contamination of the gage surface. Before use, verify the gage and the workpiece bore are at the same ambient temperature to avoid thermal expansion errors. Clean the bore and gage surface with a lint-free cloth prior to each inspection. Store the gage in its protective case when not in use to prevent damage to the precision-ground surface.