Spi 19-798-8 Class Zz Minus Plug Pin Gage 0.798 in

Product Description

The SPI 19-798-8 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and inspection work. With a nominal diameter of 0.798 inches and a minus tolerance of 0.0002 inches, this gage provides a reliable go/no-go reference for quality control checks on machined parts, drilled holes, and reamed bores. Constructed from steel for wear resistance and dimensional stability, it is a standard tool in machine shops, manufacturing facilities, and dimensional inspection environments. Metrology technicians, machinists, and quality control inspectors are the primary users of this type of gage.

Class ZZ plug gages are intended for general-purpose inspection and production use where moderate gage tolerances are acceptable. The 19-798-8 is suited for checking holes and bores in metal, plastic, and composite components across light manufacturing and job-shop environments. It functions as a minus gage, meaning its actual diameter falls below the nominal, making it appropriate for confirming minimum acceptable hole size in standard tolerance work.

Key Features

• Nominal diameter of 0.798 inches for direct bore verification
• Class ZZ tolerance rating for general-purpose production inspection
• Minus configuration confirms minimum acceptable hole size
• Steel construction provides durability and dimensional stability
• Tolerance of 0.0002 inches for consistent, repeatable measurement

Compatibility

Designed as a general-purpose plug pin gage for use with standard gage blocks, gage holders, and handle sets that accept 0.798-inch diameter pin gages in Class ZZ inspection setups.

Installation Notes

Plug pin gages are used by quality control technicians and machinists and require no permanent installation. Handle with clean, dry hands or lint-free gloves to prevent corrosion and dimensional contamination. Store in a protective case away from temperature extremes to maintain calibration integrity. Calibration intervals should follow the inspection program requirements of the facility in accordance with applicable metrology standards.