Spi 19-298-9 Class Zz Minus Plug Pin Gage 0.298 in

Product Description

The SPI 19-298-9 is a Class ZZ minus plug pin gage with a 0.298-inch nominal diameter, designed for go/no-go dimensional inspection of bored holes, drilled passages, and machined features. Built from steel, this pin gage is used to verify that a hole meets minimum acceptable size by checking whether the pin enters the feature within tolerance. The minus tolerance designation means the pin is ground to the low side of nominal, following standard Class ZZ specifications with a tolerance of 0.0002 inches. Machinists, toolroom technicians, and quality control inspectors use plug pin gages like this one as a fast, reliable method for in-process and final inspection work.

Class ZZ plug pin gages are suited for general-purpose inspection in production and toolroom environments. The 19-298-9 fits applications where hole size verification is required on steel, aluminum, plastic, or other machined workpieces. Typical use cases include checking clearance holes, verifying drill and reamer results, and confirming fit before assembly. This gage is appropriate for both shop-floor inspection and quality lab use where Class ZZ accuracy is the specified standard.

Key Features

• Class ZZ minus tolerance designation: 0.0002 inches, ground to the low side of nominal
• 0.298-inch nominal diameter for precise hole inspection at that size
• Steel construction for durability in production and toolroom environments
• Single-pin format for straightforward go/no-go dimensional checking
• Compact and lightweight at 0.2 pounds for easy hand use during inspection

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for dimensional inspection of 0.298-inch diameter holes in standard machined workpieces and assemblies.

Installation Notes

Pin gages are handled and used by machinists, toolroom techs, and QC inspectors — not installed in a system. Keep the gage clean and lightly oiled when stored to prevent corrosion on the steel surface. Never force the pin into a hole; if it does not enter with light hand pressure, the hole is undersize. Store in a protective case away from impacts to preserve the ground tolerance surface.