Spi 29-152-6 Class Zz Plus Plug Gage 0.152 in Dia

Product Description

The SPI 29-152-6 is a Class ZZ Plus plug gage designed for precision bore and hole measurement in machining, quality control, and inspection environments. It measures a nominal diameter of 0.152 inches with a tolerance of 0.0002 inches, making it appropriate for go/no-go verification of drilled, reamed, or bored holes where tight dimensional control is required. Constructed from steel, this plug gage maintains dimensional stability under typical shop-floor use. It is primarily used by machinists, quality technicians, and toolroom professionals performing inspection work to ASME or equivalent dimensional standards.

This plug gage is suited for use in precision manufacturing facilities, job shops, and quality inspection departments. It is most commonly applied to verify hole diameters in metal, plastic, or composite workpieces during in-process or final inspection. The 0.152-inch nominal size covers a specific range of drilled or reamed hole applications where standard Class ZZ Plus tolerances are specified by the drawing or inspection plan.

Key Features

• Nominal measurement diameter of 0.152 inches for targeted bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for reliable go/no-go gauging
• Steel construction for durability and dimensional stability in production environments
• Compact single-piece form factor suitable for hand-held inspection use
• Individual packaging keeps the gage protected and traceable in a tool crib or inspection kit

Compatibility

Designed as a Class ZZ Plus plug gage for go/no-go inspection of holes with a nominal diameter of 0.152 inches. Intended for use wherever ASME B89.1.5 or equivalent Class ZZ Plus tolerances apply.

Installation Notes

Plug gages are handled and applied by quality technicians or machinists during inspection — no permanent installation is required. Before use, clean both the gage and the workpiece bore to remove chips, coolant, or debris that could affect the measurement reading. Do not force the gage into an undersize bore, as this can damage the gage surface and affect calibration. Periodic recalibration against a traceable standard is recommended to maintain accuracy over time.