Spi 19-505-7 Class Zz Minus Plug Pin Gage 0.505 in

Product Description

The SPI 19-505-7 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and inspection work. It measures a nominal diameter of 0.505 inches with a minus tolerance of 0.0002 inches, placing it within the Class ZZ specification for go/no-go gauging applications. Constructed from steel, this pin gage is suited for use in quality control environments where dimensional accuracy is required. Machinists, toolmakers, and quality technicians use plug pin gages as part of standard inspection routines on production floors and in metrology labs.

Class ZZ plug pin gages are commonly used in light-production and inspection applications where close but not ultra-precision tolerances are acceptable. The 19-505-7 is appropriate for checking holes in machined components, fixtures, and assemblies where a 0.505-inch nominal bore must be confirmed. It is a single gage element intended for use with a gage handle sold separately. Typical environments include machine shops, fabrication facilities, and quality inspection stations handling metal or plastic components.

Key Features

• Class ZZ tolerance class — suitable for general inspection and light production gauging
• Minus tolerance configuration — gage is undersized by 0.0002 inches from nominal for go-gage applications
• 0.505-inch nominal diameter for direct bore verification
• Steel construction for durability in shop-floor inspection use
• Single-piece pin element — compatible with standard gage handles purchased separately

Compatibility

Designed as an OEM-style replacement or standard stocking pin gage element for use with compatible plug gage handles sized for 0.505-inch diameter pin gages. Confirm handle range compatibility before use.

Installation Notes

Pin gage elements are installed into a separate gage handle by a machinist or quality technician — no special tools are required beyond the handle itself. Handle threads and the pin shank should be clean and free of burrs before assembly. Do not force the pin into an undersized handle collet, as this can affect the calibrated tolerance. Store pin gages in a protective case away from moisture to prevent corrosion and dimensional drift.