Spi 19-527-1 Class Zz Minus Plug Pin Gage 0.527 in

Product Description

The SPI 19-527-1 is a Class ZZ minus plug pin gage with a 0.527-inch nominal diameter, manufactured from steel for dimensional inspection and go/no-go gauging applications. Class ZZ designates the least precise class in the AGD pin gage system, making this gage appropriate for general shop-floor inspection rather than laboratory-grade measurement. The minus tolerance designation means the gage is manufactured below nominal by 0.0002 inches, which is the standard minus tolerance for Class ZZ gages in this size range. This type of instrument is used by machinists, quality control technicians, and tool-and-die professionals to verify hole dimensions and bore tolerances during production and incoming inspection.

This plug pin gage is suited for general-purpose dimensional inspection on the shop floor, in fabrication environments, and in quality control departments. It is commonly used to check drilled, reamed, or bored holes in metal, plastic, and composite workpieces. The 0.527-inch diameter places it in a mid-range size category used across a wide variety of machining and manufacturing applications where accurate hole verification is required.

Key Features

• Class ZZ minus tolerance of 0.0002 inches for general shop-floor dimensional inspection
• 0.527-inch nominal diameter for mid-range hole gauging applications
• Steel construction for durability and wear resistance in production environments
• Minus designation confirms gage is manufactured below nominal, consistent with AGD Class ZZ standards
• Individual pin gage format allows use as a standalone check or as part of a pin gage set

Compatibility

Designed as a general-purpose plug pin gage compatible with standard AGD-style pin gage handles and pin gage sets that accept 0.527-inch diameter pins.

Installation Notes

Pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils and to maintain calibration integrity. Store the gage in a protective case away from other metal tooling to avoid nicks or surface damage that could affect measurement accuracy. Inspect the gage surface for wear or damage before each use; a worn or damaged gage should be removed from service and recalibrated or replaced. Calibration intervals should be established per your facility's quality management procedures and applicable metrology standards.