Spi 19-808-5 Class Zz Minus Plug Pin Gage 0.808 in

Product Description

The SPI 19-808-5 is a Class ZZ minus plug pin gage machined from steel, used to verify hole diameters to a nominal size of 0.808 inches. Minus plug gages are ground below the nominal dimension, conforming to the GO gage principle for checking minimum material condition. With a tolerance of 0.0002 inches, this gage delivers the dimensional accuracy required for production inspection, quality control, and toolroom verification work. It is handled and used by machinists, toolmakers, and quality technicians who need reliable go/no-go hole measurement in a compact, single-ended pin format.

Class ZZ plug gages are the standard choice for general-purpose inspection of drilled, reamed, or bored holes in manufacturing and fabrication environments. This 0.808-inch diameter pin is suited to both job-shop and production-floor use where confirming hole size to print tolerances is a routine requirement. The minus designation indicates the gage is manufactured to the lower allowable limit of the nominal diameter, making it appropriate for checking that holes meet minimum size specifications.

Key Features

• Nominal diameter of 0.808 inches for precise hole verification
• Class ZZ tolerance grade at 0.0002 inches for general-purpose inspection accuracy
• Minus designation confirms minimum material condition of the gauged hole
• Steel construction for durability in production and toolroom environments
• Single-piece pin gage format for straightforward manual use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for any application requiring Class ZZ minus inspection of 0.808-inch nominal diameter holes.

Installation Notes

Plug pin gages are used by quality technicians and machinists and require no permanent installation. Before use, clean both the gage and the hole being measured to remove chips, oil, or debris that can affect readings. Apply light gage oil to the pin before insertion to prevent galling and protect the gage surface. Store the gage in its protective case when not in use to prevent damage to the precision-ground surface.