Spi 19-102-3 Class Zz Minus Plug Pin Gage 0.102 in

Product Description

The SPI 19-102-3 is a Class ZZ minus plug pin gage machined from steel, used to verify bore diameters and hole sizes in precision inspection work. With a nominal diameter of 0.102 inches and a tolerance of 0.0002 inches, this gage is built to the ZZ classification standard, which defines the allowable deviation on the gage itself. The minus designation means the gage is ground to the lower tolerance boundary, making it suitable for go/no-go gauging applications where consistent, repeatable measurement is required. Machinists, quality control inspectors, and toolroom technicians use plug pin gages like this one to confirm that drilled, reamed, or punched holes meet print dimensions before parts advance in production.

This gage is suited for use in machine shops, toolrooms, and quality inspection environments where small-diameter hole verification is required. It is appropriate for both incoming inspection and in-process quality checks on machined components. The 0.102-inch diameter makes it a practical choice for checking holes produced by small drills or punches in light-gauge metal, plastic, or composite workpieces. A single gage is included per package.

Key Features

• Class ZZ tolerance classification for general-purpose inspection use
• Minus designation ground to lower tolerance boundary for go/no-go applications
• 0.102-inch nominal diameter for small-bore verification
• Tolerance of 0.0002 inches ensures consistent gage-to-gage repeatability
• Steel construction provides durability for repeated use in production environments

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general-purpose hole and bore inspection in machining and quality control applications.

Installation Notes

Plug pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, clean the gage and the bore being checked with a lint-free cloth to remove chips, coolant, or debris that could affect the measurement. Apply light hand pressure only when inserting the gage into a bore — never force it. Store the gage in its protective case when not in use to prevent damage to the ground surface.