Spi 29-334-0 Class Zz Plus Plug Gage 0.334 in

Product Description

The SPI 29-334-0 is a Class ZZ Plus plug gage designed to verify the diameter of bored or reamed holes to a nominal size of 0.334 inches. Built from steel, it delivers a go/no-go measurement function for production and quality-control environments. The gage holds a tolerance of 0.0002 inches, meeting Class ZZ Plus specifications for checking workpiece hole acceptance in shop-floor inspection routines. Machinists, toolmakers, and quality technicians use plug gages like this one to confirm whether a drilled or reamed hole falls within the required size range before a part advances to the next stage of production.

This plug gage is suited for use in manufacturing, machine shops, and precision fabrication facilities where hole diameter verification is a routine step. It fits applications involving steel, aluminum, and similar materials where tight dimensional control is required. The 0.334-inch nominal diameter makes it appropriate for verifying holes produced by standard drilling and reaming operations in both light production and inspection environments.

Key Features

• Class ZZ Plus tolerance grade at 0.0002 inches for reliable go/no-go gauging
• Nominal measurement diameter of 0.334 inches
• Steel construction for durability in shop-floor use
• Compact and lightweight at 0.2 pounds for easy single-hand use
• Single-piece design with no additional components required for basic gauging tasks

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for quality inspection of 0.334-inch nominal diameter holes in standard production and inspection applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians and do not require power or special tooling to operate. Clean and deburr the hole being checked before inserting the gage to avoid damaging the gage surface or producing a false reading. Store the gage in a protected case when not in use to prevent nicks or corrosion that could affect measurement accuracy. Calibrate or verify the gage against a traceable standard on a scheduled basis per your facility quality plan.