Spi 19-288-0 Class Zz Minus Plug Pin Gage 0.288 in

Product Description

The SPI 19-288-0 is a Class ZZ minus plug pin gage ground to a nominal diameter of 0.288 inches with a minus tolerance of 0.0002 inches. Plug pin gages are used to verify hole diameters and internal feature dimensions by checking whether a machined bore, drilled hole, or precision opening falls within a specified tolerance range. This gage is constructed from steel for dimensional stability during repeated use. Class ZZ is the standard tolerance class for general-purpose inspection work in production and shop-floor environments. Machinists, toolmakers, quality control technicians, and precision manufacturing professionals use this type of gage as part of go/no-go or attribute inspection routines.

This gage is suited for inspecting holes and bores in machined components, fixtures, molds, and assemblies where a nominal 0.288-inch diameter is specified. It is appropriate for both production line checks and incoming inspection in machine shops, manufacturing facilities, and toolrooms. The minus designation means the gage is manufactured at or below the nominal size, making it a no-go style member or a specific-fit check tool depending on the inspection protocol in use.

Key Features

• Nominal diameter of 0.288 inches for direct hole-size verification
• Class ZZ tolerance grade suited for general-purpose shop and production inspection
• Minus tolerance of 0.0002 inches for precise dimensional control
• Steel construction provides durability and dimensional stability under repeated use
• Compact and lightweight at 0.2 pounds for easy single-hand operation

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for any inspection application requiring a Class ZZ minus gage at 0.288 inches nominal diameter.

Installation Notes

Plug pin gages should be handled with clean, dry hands or lint-free gloves to prevent dimensional error from contamination or corrosion. Before use, clean the gage and the part bore with a lint-free cloth to remove chips, oil, or debris that could affect the reading. Apply light, consistent hand pressure when inserting the gage into the bore — never force entry. Store the gage in its protective case when not in use to preserve the ground surface and prevent wear or impact damage.