Spi 19-430-8 Class Zz Minus Plug Pin Gage 0.43 in

Product Description

The SPI 19-430-8 is a Class ZZ minus plug pin gage used to verify hole diameters and bore tolerances in precision machining and inspection applications. The gage measures 0.43 inches in diameter and is manufactured from steel for durability in shop-floor environments. With a tolerance of 0.0002 inches, it provides the accuracy required for go/no-go gauging workflows. Class ZZ gages are the standard choice for general-purpose inspection, quality control departments, and tool rooms where tight dimensional verification is part of routine work. Licensed machinists, toolmakers, and quality technicians are the primary users of this type of instrument.

This plug pin gage is suited for inspecting drilled, reamed, or bored holes in metal or plastic workpieces during manufacturing or incoming inspection. It is used in tool rooms, production floors, and metrology labs where dimensional compliance must be documented or verified before parts move to the next stage. The minus designation means the gage is manufactured to the lower boundary of the tolerance range, which is consistent with standard go-gage practice for hole verification.

Key Features

• 0.43 inch nominal diameter for direct hole size verification
• Class ZZ tolerance class suitable for general-purpose inspection use
• Minus designation manufactured to the lower tolerance boundary
• 0.0002 inch tolerance for precise dimensional control
• Steel construction for wear resistance in production environments

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for general-purpose hole inspection in standard 0.43 inch nominal diameter applications.

Installation Notes

Plug pin gages are handled and used by machinists, toolmakers, and quality control technicians. Before use, clean the gage and the bore being inspected to remove chips, coolant, and debris that could affect readings. Do not force the gage into a hole under load, as this can damage the gage land or the workpiece bore. Store gages in a protective case away from temperature extremes to preserve dimensional stability.