Spi 29-283-9 Class Zz Plus Plug Gage 0.283 in

Product Description

The SPI 29-283-9 is a Class ZZ Plus plug gage designed to verify hole diameters to a nominal size of 0.283 inches with a tolerance of 0.0002 inches. Plug gages are go/no-go or single-end inspection tools used to confirm that a machined or drilled hole falls within a specified dimensional tolerance. This gage is constructed from steel and is suited for production floor inspection, incoming quality checks, and toolroom verification. Machinists, quality control technicians, and tool-and-die professionals use plug gages as a fast, reliable alternative to inside micrometers for fixed-size hole verification.

Class ZZ Plus plug gages are intended for general-purpose inspection work where tight process control is required. This 0.283-inch diameter gage is appropriate for use in metalworking, fabrication shops, and manufacturing environments where hole size conformance must be confirmed before assembly. It is a standard single-size gage and is typically used by hand without fixturing. Weighing 0.2 pounds, it is compact enough for bench use or inline inspection on the production floor.

Key Features

• Nominal diameter of 0.283 inches for precise fixed-size hole inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for general-purpose inspection accuracy
• Steel construction for durability in production and toolroom environments
• Lightweight at 0.2 pounds for easy single-hand operation
• Single-piece design requires no adjustment or calibration setup before use

Compatibility

Designed as an OEM-style inspection gage for use wherever a 0.283-inch diameter hole must be verified to Class ZZ Plus tolerance standards in metalworking and manufacturing applications.

Installation Notes

Plug gages are inspection instruments, not installation components. They should be handled by qualified metrology or quality control personnel. Clean the gage and the hole being checked before use to avoid false readings caused by debris or burrs. Store the gage in a protected case away from heat sources and humidity to maintain dimensional integrity over time.