Spi 29-133-6 Class Zz Plus Plug Gage 0.133 in Steel

Product Description

The SPI 29-133-6 is a Class ZZ Plus plug gage designed for precision go/no-go inspection of small-diameter holes. With a nominal measurement diameter of 0.133 inches and a tolerance of 0.0002 inches, this gage confirms that drilled, reamed, or bored holes meet tight dimensional requirements. The steel construction provides durability through repeated use in shop-floor inspection environments. Machinists, quality technicians, and tool-room professionals use plug gages like this one to verify hole acceptance during in-process and final inspection routines.

This plug gage is suited for use in machine shops, manufacturing facilities, and precision fabrication environments where consistent hole diameter verification is required. It applies to any application calling for a Class ZZ Plus tolerance standard at the 0.133-inch nominal diameter. The compact form factor makes it easy to store in a gage kit alongside other members of a stepped or incremental gage set. It is appropriate for both production-line inspection and bench-level quality control work.

Key Features

• Nominal measurement diameter of 0.133 inches for small-hole inspection
• Class ZZ Plus tolerance of 0.0002 inches for precise go/no-go verification
• Steel construction for long service life under repetitive use
• Compact single-piece design compatible with standard gage handle holders
• Suitable for in-process and final inspection in precision machining applications

Compatibility

Designed as an OEM-style replacement or supplemental gage for Class ZZ Plus plug gage sets requiring a 0.133-inch diameter member. Compatible with standard gage handle holders sized for small-diameter plug gage blanks.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin contact. Store in a protective case away from other tooling to avoid surface damage that could affect dimensional accuracy. Calibrate or verify gage accuracy against a traceable reference standard before placing into service. No power tools or cutting are involved; installation consists of seating the gage blank into the appropriate handle holder per the handle manufacturer's instructions.