Spi 29-103-9 Class Zz Plus Plug Gage 0.103 in

Product Description

The SPI 29-103-9 is a Class ZZ Plus plug gage used to verify the inside diameter of precision holes and bores during manufacturing inspection and quality control work. It measures 0.103 inches in diameter with a tolerance of 0.0002 inches, making it suitable for applications where tight dimensional accuracy is required. Constructed from steel, this plug gage is designed for repetitive use in shop-floor and inspection-room environments. Machinists, toolmakers, and quality technicians use plug gages like this one to confirm that drilled, reamed, or punched holes meet specified tolerances before parts advance in production.

This gage is appropriate for use in machine shops, fabrication facilities, and production inspection stations handling small-diameter hole verification. The 0.103-inch nominal diameter fits applications involving fine drill sizes and precision-machined components. Class ZZ Plus gages are typically used for production inspection of commercial-tolerance parts where a reliable, cost-effective go or no-go measurement is needed without requiring the tighter tolerances of Class Z or ZZ master gages.

Key Features

• Nominal measurement diameter of 0.103 inches for precise small-bore inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for reliable production-level accuracy
• Steel construction for durability in shop-floor environments
• Compact and lightweight at 0.2 pounds for easy one-handed use during inspection
• Single-piece packaging suits individual bench or kit use

Compatibility

Designed as an OEM-style inspection tool for verifying 0.103-inch nominal inside diameters in production and quality control applications where Class ZZ Plus tolerance standards apply.

Installation Notes

Plug gages are handled and used by machinists and quality inspection technicians following standard metrology practices. Clean the gage and the workpiece bore before use to avoid false readings caused by chips or debris. Do not force the gage through a hole — excessive insertion pressure can damage the gage or the workpiece and will produce inaccurate results. Store in a clean, dry location away from other tooling to prevent surface damage that would affect measurement accuracy.