Spi 19-456-3 Class Zz Minus Plug Pin Gage 0.456 in

Product Description

The SPI 19-456-3 is a Class ZZ minus plug pin gage machined to a 0.456-inch nominal diameter with a tolerance of 0.0002 inches. Pin gages in this class are used to verify hole diameters, check slot widths, and confirm feature sizes on machined parts during inspection and quality-control operations. The minus designation means the gage is ground to the low side of the nominal diameter, which is the standard for go/no-go inspection workflows. Constructed from steel, this gage is a straightforward hand tool used by machinists, quality technicians, and tool-and-die professionals on the shop floor or in inspection departments.

Class ZZ plug pin gages are the general-purpose grade used in production inspection environments where tight-tolerance measurement is required but Class Z or ZZ-plus precision is not specified. The 19-456-3 is suited for checking 0.456-inch diameter features in metal, plastic, or composite workpieces. It is typically used at receiving inspection stations, in-process QC checks, or final part verification. The compact form factor and 0.2-pound weight make it easy to handle during high-volume inspection tasks.

Key Features

• Class ZZ minus tolerance grade for standard production inspection use
• 0.456-inch nominal diameter for direct hole and feature verification
• Tolerance of 0.0002 inches for consistent, repeatable go/no-go checks
• Steel construction for durability and wear resistance in shop environments
• Lightweight at 0.2 pounds for comfortable single-hand operation

Compatibility

Designed as an OEM-style replacement or standard addition to Class ZZ pin gage sets used in production and inspection applications requiring a 0.456-inch diameter plug gage.

Installation Notes

Pin gages require no installation but should be handled by quality technicians or machinists familiar with go/no-go inspection procedures. Keep the gage clean and lightly oiled when stored to prevent corrosion on the steel surface. Do not force the gage into a feature that does not accept it freely, as this can damage the gage surface and compromise measurement accuracy. Handle with clean gloves or a gage cloth to avoid introducing thermal expansion errors from hand contact.