Spi 19-407-6 Class Zz Minus Plug Pin Gage 0.407 in

Product Description

The SPI 19-407-6 is a Class ZZ minus plug pin gage ground to a nominal diameter of 0.407 inches with a minus tolerance of 0.0002 inches. Pin gages are single-ended or double-ended cylindrical tools used to verify hole diameters, slot widths, and feature locations to a known dimensional standard. This gage is manufactured from steel for wear resistance and dimensional stability. Machinists, quality technicians, and tool-and-die professionals use plug pin gages as go or no-go references during in-process inspection and final part acceptance checks on the shop floor or in the inspection room.

Class ZZ is the most common tolerance grade for general shop-floor use and receiving inspection. This gage is suited to checking drilled, reamed, or punched holes in metal, plastic, or composite workpieces where a 0.407-inch nominal feature must be confirmed within a defined tolerance band. The minus designation means the gage is ground below nominal, making it appropriate for go-gage applications where entry into the feature confirms the hole is at or above minimum acceptable size.

Key Features

• Nominal diameter of 0.407 inches ground to Class ZZ minus tolerance of 0.0002 inches
• Steel construction provides durability and resistance to wear during repeated gauging cycles
• Minus tolerance ground below nominal — suitable for go-gage hole-acceptance checks
• Single-piece pin form for straightforward hand use without additional tooling
• Lightweight at 0.2 pounds for comfortable extended use during inspection runs

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in any application requiring dimensional verification of a 0.407-inch nominal hole or feature.

Installation Notes

Plug pin gages require no installation but should be handled and stored according to standard metrology practices. Clean the gage and the feature to be checked before use to prevent debris from affecting readings or causing surface damage. Do not force the gage into an undersized hole, as this can damage the gage and alter its calibrated diameter. Periodic recalibration against a traceable standard is recommended to confirm the gage remains within its stated tolerance over its service life.