Spi 19-517-2 Class Zz Minus Plug Pin Gage 0.517 in

Product Description

The SPI 19-517-2 is a Class ZZ minus plug pin gage machined to a nominal diameter of 0.517 inches with a tolerance of 0.000200 inches in the minus direction. Plug pin gages are go/no-go inspection tools used to verify bore and hole diameters to a known standard. The minus tolerance designation means the gage is ground to the lower limit of the nominal size, which is standard practice for go-member gages in dimensional inspection workflows. Manufactured from steel, this gage is a bench-level instrument suited for quality control technicians, machinists, and tool room personnel who require repeatable, traceable measurement references.

Class ZZ is the most common commercial-grade tolerance class for plug gages and is appropriate for general shop-floor inspection of machined holes, bores, and drilled features. This gage is typically used in production inspection environments, incoming material checks, and fixture verification. It is suited for use with standard gage blocks and bore measuring setups where a 0.517-inch nominal reference is required. Proper gage handling, including avoiding contact with abrasive surfaces and storing in a protective case, preserves calibration integrity over time.

Key Features

• Nominal diameter of 0.517 inches for direct bore and hole inspection
• Class ZZ minus tolerance of 0.000200 inches for general commercial inspection use
• Steel construction provides durability and dimensional stability for repeated use
• Minus plug designation suitable for go-member gage applications
• Individual unit packaging supports single-piece procurement for replacement or expansion of gage sets

Compatibility

Designed as a Class ZZ minus plug pin gage for use in standard go/no-go inspection setups requiring a 0.517-inch nominal diameter reference.

Installation Notes

Plug pin gages are handled by quality control technicians and tool room machinists and do not require power tools or fastener torque. Clean the gage and the bore being checked before use to prevent false readings from debris or burrs. Store the gage in a protective case away from magnets, abrasives, and temperature extremes to maintain calibration. Periodic recalibration against a traceable standard is recommended per your facility quality management procedures.