Spi 29-113-8 Class Zz Plus Plug Gage 0.113 Inch

Product Description

The SPI 29-113-8 is a Class ZZ Plus plug gage used to verify the diameter of machined holes to a tolerance of 0.0002 inches. Manufactured from steel, this go/no-go style instrument is designed for dimensional inspection in production and quality-control environments. The 0.113-inch nominal diameter makes it suitable for checking small-bore features on machined components. Class ZZ designates the tolerance grade appropriate for general-purpose inspection work. Machinists, quality technicians, and tool-room personnel use plug gages like this one to confirm that hole dimensions fall within specified limits before parts advance to assembly or shipment.

This plug gage is used in machine shops, manufacturing facilities, and inspection departments where small-bore hole verification is required. It is appropriate for both production floor use and incoming inspection of machined parts. The steel construction provides durability for repeated use across high-volume inspection cycles. It is a hand-held instrument requiring no power source, making it straightforward to deploy at any workstation or inspection station.

Key Features

• 0.113-inch nominal measurement diameter for small-bore hole inspection
• Class ZZ Plus tolerance grade at 0.0002 inches, suitable for general-purpose dimensional inspection
• Steel construction for durability and resistance to wear during repeated use
• No power source required — functions as a direct hand-held go/no-go inspection tool
• Compact, lightweight design at 0.2 pounds for easy bench or floor use

Compatibility

Designed as a general-purpose Class ZZ Plus plug gage for verifying 0.113-inch nominal diameter holes in machined parts across standard production and inspection applications.

Installation Notes

Plug gages are handled and used by machinists or quality control technicians — no installation in the traditional sense applies. Before use, clean the gage and the hole being inspected to remove chips, coolant, or debris that could affect the reading. Handle the gage carefully to avoid dropping, which can alter the ground surfaces and compromise accuracy. Store in a protective case away from temperature extremes to maintain calibration integrity.