Spi 29-223-5 Class Zz Plus Plug Gage 0.223 Inch

Product Description

The SPI 29-223-5 is a Class ZZ Plus plug gage machined to a nominal measurement diameter of 0.223 inches with a tolerance of 0.0002 inches. Plug gages of this class are used to verify that a drilled, reamed, or bored hole meets a specified dimensional requirement. The ZZ classification denotes a working gage grade suited to general shop-floor inspection and production-line quality control. Constructed from steel, this gage delivers the dimensional stability and wear resistance required for repeated use in high-volume inspection environments. Machinists, quality technicians, and tool-and-die professionals are the primary users of this instrument.

This plug gage is appropriate for inspecting small-diameter holes in metal components across a wide range of manufacturing and machining applications. It is well suited to production inspection in job shops, precision machine shops, and manufacturing facilities where go/no-go verification of hole diameter is a routine part of process control. Its compact size and single-ended format make it easy to handle during high-repetition inspection tasks.

Key Features

• Nominal measurement diameter of 0.223 inches for precise hole verification
• Class ZZ Plus tolerance of 0.0002 inches for reliable working-gage accuracy
• Steel construction for dimensional stability and long service life
• Compact and lightweight at 0.2 pounds for easy single-hand use
• Suitable for go/no-go inspection on production and shop-floor environments

Compatibility

Designed as a working-class plug gage for inspection of 0.223-inch nominal diameter holes in standard machined or fabricated components. Consult your engineering drawings and tolerance stack-up to confirm fitment before use.

Installation Notes

Plug gages are handled and used by quality technicians and machinists; no installation in the traditional sense applies. Before use, clean both the gage and the workpiece bore to remove chips, coolant, and debris that could affect the reading or damage the gage surface. Never force a plug gage into an undersize hole, as this causes premature wear and inaccurate results. Gages should be periodically re-calibrated against a traceable standard to ensure continued measurement accuracy.