Spi 29-887-7 Class Zz Plus Plug Gage 0.887 in Dia

Product Description

The SPI 29-887-7 is a Class ZZ Plus plug gage designed to verify hole diameters to a nominal size of 0.887 inches with a tolerance of 0.0002 inches. Plug gages of this class are go/no-go inspection tools used to confirm that bored, drilled, or reamed holes fall within acceptable dimensional limits. The steel construction provides durability and resistance to wear under repeated use in shop or inspection environments. Machinists, quality control technicians, and tool-and-die professionals rely on Class ZZ Plus gages for production and incoming inspection work where precise hole verification is required.

This plug gage is suited for use in machine shops, manufacturing facilities, and quality inspection stations. It is appropriate for checking hole diameters in metal, plastic, or composite workpieces where a nominal 0.887-inch hole must be verified against a tight tolerance. The compact form factor and low weight of 0.2 pounds make it easy to handle during bench or floor inspection. It is commonly used in both low-volume tool rooms and higher-volume production inspection lines.

Key Features

• Nominal measurement diameter of 0.887 inches for precise hole verification
• Class ZZ Plus tolerance of 0.0002 inches ensures accurate go/no-go inspection
• Steel construction for durability and wear resistance under repeated use
• Lightweight at 0.2 pounds for easy single-hand handling during inspection
• Single-piece package quantity suits individual tool crib or bench use

Compatibility

Designed as a standard Class ZZ Plus plug gage for verifying 0.887-inch nominal diameter holes in general machining and inspection applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians — no installation in the mechanical sense is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Do not force the gage into an undersized hole, as this can damage the gage or the workpiece. Store in a protective case away from other metal tools to avoid nicks or surface damage that would affect measurement accuracy.