Spi 19-108-0 Class Zz Minus Plug Pin Gage 0.108 in

Product Description

The SPI 19-108-0 is a Class ZZ minus plug pin gage machined from steel and used to verify that a hole or bore falls within a specified dimensional tolerance. The gage measures 0.108 inches in diameter and holds a tolerance of 0.0002 inches, making it appropriate for general-purpose inspection work where tight dimensional control is required. Class ZZ is a standard commercial-grade classification suited for shop-floor go/no-go inspection applications. Machinists, toolmakers, and quality control technicians use plug gages like this one to confirm bore size quickly and reliably without requiring a CMM or digital measuring instrument.

This gage is used in machine shops, manufacturing facilities, and toolrooms where holes must be checked to a specific diameter before assembly or further processing. It is a minus-type gage, meaning the gage diameter is ground to the lower end of the nominal size, which is a standard approach for go-gage applications. At 0.108 inches nominal diameter, this gage covers a small-bore range common in precision mechanical components and light manufacturing.

Key Features

• Class ZZ tolerance classification for general commercial shop-floor inspection
• Minus designation suits go-gage applications at the lower tolerance boundary
• 0.108 inch nominal diameter for small-bore measurement
• 0.0002 inch tolerance for reliable dimensional verification
• Steel construction for durability under repeated handling and use

Compatibility

Designed as an OEM-style replacement or direct-use Class ZZ minus plug pin gage for standard shop-floor inspection setups requiring a 0.108 inch nominal bore check.

Installation Notes

Plug pin gages do not require installation in the traditional sense but should be handled and stored carefully to prevent surface damage that would affect measurement accuracy. Clean the gage and the bore being checked before use to remove chips, coolant, or debris. Apply light gage oil when storing to prevent corrosion on the steel surface. Follow your shop calibration schedule and applicable ASME B89.1.5 standards for gage inspection and re-certification intervals.