Spi 19-376-3 Class Zz Minus Plug Pin Gage 0.376 in

Product Description

The SPI 19-376-3 is a Class ZZ minus plug pin gage with a 0.376-inch nominal diameter, manufactured from steel for consistent dimensional accuracy in precision measurement applications. It is used to verify hole sizes and bore diameters by checking whether a feature falls within a specified tolerance. The minus designation means the gage is manufactured to the lower limit of the tolerance range, providing a go-type check. With a tolerance of 0.0002 inches, this pin gage meets Class ZZ standards, making it appropriate for production inspection, incoming quality control, and toolroom verification tasks performed by machinists, quality technicians, and metrologists.

Class ZZ plug gages are widely used in manufacturing environments for checking drilled, reamed, or bored holes in metal and plastic components. The 19-376-3 is suited for inspection stations and toolrooms where hole diameter conformance must be verified quickly and reliably. It is a single-pin gage intended for use as a standalone check pin or in combination with a pin gage set and handle. Typical applications include production floor inspection of machined parts and quality assurance workflows in fabrication shops.

Key Features

• Class ZZ tolerance class meets standard go-gage inspection requirements
• Minus designation confirms the gage is held to the lower tolerance boundary
• 0.0002-inch tolerance for reliable dimensional verification
• Steel construction provides durability and wear resistance in regular use
• 0.376-inch nominal diameter for precise hole and bore checking

Compatibility

Designed as an OEM-style replacement or equivalent check pin for use in standard plug gage handles and fixtures accepting 0.376-inch diameter Class ZZ minus plug gages.

Installation Notes

Pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, clean the gage and the feature being measured with an appropriate solvent to remove chips, coolant, or debris. Store pin gages in a protective case away from contact with other tooling to prevent nicking or wear on the gage surface. Calibration and use should follow ASME B89.1.5 or applicable shop quality standards.