Spi 19-985-1 Class Zz Minus Plug Pin Gage 0.985 in

Product Description

The SPI 19-985-1 is a Class ZZ minus plug pin gage with a 0.985-inch nominal diameter, manufactured from steel for durability in repeated inspection use. Plug pin gages are used to verify hole diameters and confirm that machined bores fall within specified dimensional tolerances. This gage is built to Class ZZ standards, the common tolerance class for general-purpose inspection of production parts, and carries a minus tolerance of 0.0002 inches, keeping the gage undersized relative to nominal. Machinists, quality control inspectors, and tool-and-die professionals rely on this type of gage for fast, reliable go/no-go dimensional verification on the shop floor or in the inspection room.

This gage is suited for use in machine shops, manufacturing facilities, and quality assurance environments where consistent hole-size verification is required. It applies wherever a 0.985-inch diameter bore must be checked against print tolerance, including production inspection of cast, drilled, or reamed holes in metal or plastic components. The 0.2-pound weight makes it easy to handle during repetitive inspection tasks.

Key Features

• Class ZZ tolerance class for general-purpose production inspection
• Minus plug configuration keeps gage undersized at 0.0002-inch tolerance
• 0.985-inch nominal diameter for direct go/no-go hole verification
• Steel construction for long service life under frequent use
• Lightweight at 0.2 pounds for easy single-hand handling

Compatibility

Designed as an OEM-style Class ZZ minus plug pin gage for use in standard inspection and quality control applications requiring a 0.985-inch diameter bore check.

Installation Notes

Plug pin gages are used by quality control inspectors and machinists and require no installation in the traditional sense. Before use, clean the gage and the bore to be checked to remove chips, oil, or debris that could affect measurement accuracy. Do not force the gage into a hole; if resistance is felt, the bore is undersized and should be evaluated accordingly. Store the gage in a protective case away from other tooling to prevent surface damage that would affect calibration.