Spi 19-342-5 Class Zz Minus Plug Pin Gage 0.342 in

Product Description

The SPI 19-342-5 is a Class ZZ minus plug pin gage with a nominal diameter of 0.342 inches and a tolerance of 0.0002 inches. It is used to verify hole diameters and bore sizes in machined parts, tooling, and fabricated components. The steel construction provides durability and dimensional stability under typical shop conditions. Class ZZ designates a standard commercial-grade tolerance class suitable for general inspection work. Machinists, quality control technicians, and tool-and-die professionals use plug pin gages as part of go/no-go inspection routines to confirm that drilled, reamed, or punched holes meet specification.

This gage is suited for use in production inspection environments, machine shops, fabrication facilities, and maintenance departments where hole-size verification is a routine task. The 0.342-inch diameter makes it appropriate for inspecting holes in that size range across a variety of materials and part types. It is packaged and sold as a single gage, making it a straightforward replacement or addition to an existing gage set.

Key Features

• Nominal diameter of 0.342 inches for precise hole inspection at that size
• Class ZZ tolerance class at 0.0002 inches, suitable for commercial-grade inspection
• Minus designation indicates the gage is sized at the lower tolerance boundary
• Steel construction for shop durability and dimensional stability
• Single-piece packaging for individual replacement or set supplementation

Compatibility

Designed as an OEM-style replacement or addition for standard plug pin gage sets used in general machining and inspection applications where a 0.342-inch nominal diameter is required.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians following standard metrology practices. Clean the gage and the bore being inspected before use to prevent debris from affecting readings. Store the gage in a protective case away from tooling and abrasive surfaces to preserve the ground finish. Calibration and periodic inspection against certified reference standards are recommended to maintain measurement integrity.