Spi 29-048-6 Class Zz Plus Plug Gage 0.048 in Dia

Product Description

The SPI 29-048-6 is a Class ZZ Plus plug gage used to verify bore and hole dimensions to a nominal diameter of 0.048 inches with a tolerance of 0.0002 inches. Plug gages are go/no-go inspection tools used in precision machining, manufacturing, and quality control applications to confirm that a drilled or reamed hole falls within acceptable size limits. The 29-048-6 is constructed of steel for durability and dimensional stability under repeated use. It is a standard single-piece inspection gage suited for incoming inspection, in-process checking, and final verification on the shop floor or in a metrology lab.

This gage is intended for use in industrial precision measurement environments where tight hole tolerances must be confirmed quickly and reliably. Typical applications include verifying pilot holes, clearance holes, and precision bores in machined components. The Class ZZ Plus designation indicates a tighter gage tolerance than standard Class ZZ, making it appropriate for applications where measurement accuracy is critical. Machinists, quality technicians, and tool-and-die professionals are the primary users of this type of gage in production and inspection settings.

Key Features

• Nominal measurement diameter of 0.048 inches for precise small-bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for accurate go/no-go verification
• Steel construction for wear resistance and dimensional stability
• Compact, single-piece design suited for repeated shop-floor or lab use
• Lightweight at 0.2 pounds for easy one-handed handling

Compatibility

Designed as an OEM-style precision inspection tool for use wherever Class ZZ Plus plug gages are specified for small-bore diameter verification in machined components.

Installation Notes

Plug gages are hand-inspection tools and do not require mechanical installation. Store the gage in a protective case when not in use to prevent damage to the precision ground surface. Clean the gage and the hole being measured before use to avoid false readings from debris or burrs. Handle with care to avoid dropping, which can alter the calibrated diameter.