Spi 19-835-8 Class Zz Minus Plug Pin Gage 0.835 in

Product Description

The SPI 19-835-8 is a Class ZZ minus plug pin gage with a 0.835-inch nominal diameter, manufactured from steel for durability in production and inspection environments. This gage is used to verify that a hole or bore meets minimum size requirements, with a tolerance of 0.0002 inches applied in the minus direction from the nominal dimension. Class ZZ is the standard tolerance class for plug gages used in go/no-go inspection routines on production floors and in quality control departments. Machinists, toolmakers, and quality technicians use this type of gage as part of standard dimensional inspection workflows.

This gage is suited for dimensional verification of drilled, reamed, or bored holes in manufacturing and fabrication settings. It is appropriate for both incoming inspection and in-process quality checks where hole diameter conformance must be confirmed. The minus designation means the gage is ground to the lower end of the tolerance band, making it suitable as a go gage in paired go/no-go setups or as a standalone check for minimum acceptable hole size.

Key Features

• Class ZZ tolerance class for standard production and inspection use
• Minus designation allows use as a go gage for minimum hole size verification
• 0.0002-inch tolerance for consistent and repeatable measurement results
• Steel construction provides wear resistance in shop floor environments
• 0.835-inch nominal diameter for precise fitment in corresponding bore sizes

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in go/no-go inspection setups involving holes and bores with a nominal diameter of 0.835 inches.

Installation Notes

Plug pin gages are handled and used by quality technicians and machinists; no power tools or utilities need to be shut off before use. Store the gage in a protective case when not in use to prevent damage to the ground surface. Clean the gage and the workpiece bore before inspection to avoid measurement error caused by chips or debris. Follow ASME B89.1.5 or applicable shop standards for gage handling, calibration intervals, and go/no-go acceptance criteria.