Spi 19-564-4 Class Zz Minus Plug Pin Gage 0.564 in

Product Description

The SPI 19-564-4 is a Class ZZ minus plug pin gage designed to verify hole diameters and bore tolerances in precision manufacturing and inspection environments. At 0.564 inches in diameter, this gage is used to confirm whether a hole is within specified dimensional limits. The minus designation means the gage is manufactured to the lower allowable tolerance boundary, providing a go/no-go reference point for quality control checks. Machined from steel for durability and dimensional stability, it is a standard tool in toolrooms, machine shops, and production inspection stations.

Class ZZ plug gages are the most common grade used in general-purpose inspection work where high-precision laboratory tolerances are not required. This 0.564-inch gage fits inspection workflows for machined components, fabricated assemblies, and production runs where hole size verification is part of the quality process. It is handled by machinists, quality technicians, and manufacturing engineers performing dimensional checks on drilled, reamed, or bored features.

Key Features

• Class ZZ tolerance class suitable for general-purpose production inspection
• Minus designation provides lower-boundary go/no-go reference for hole verification
• 0.564-inch nominal diameter for precise bore and hole checks
• Steel construction for wear resistance and dimensional stability
• 0.0002-inch (0.0002 mm) tolerance for consistent measurement repeatability

Compatibility

Designed as a standard Class ZZ minus plug gage for use in general-purpose dimensional inspection of holes and bores measuring 0.564 inches in diameter.

Installation Notes

Plug pin gages are used by quality technicians and machinists during inspection and do not require installation in the traditional sense. Before use, clean the gage and the bore being checked to remove chips, oil, or debris that could affect measurement accuracy. Do not force the gage into a hole; apply light, steady hand pressure only. Store the gage in a protective case away from other tooling to prevent surface damage and maintain calibration integrity.