Spi 29-500-6 Class Zz Plus Plug Gage 0.5 in Dia

Product Description

The SPI 29-500-6 is a Class ZZ Plus plug gage designed for precise internal diameter measurement at 0.5 inches (0.5000 inches nominal). It holds a tolerance of 0.0002 inches, meeting Class ZZ Plus standards for go/no-go inspection work. Constructed from steel, this gage is built to withstand repeated use in production and quality-control environments. Machinists, tool-and-die technicians, and quality assurance personnel use plug gages like this one to verify that drilled, bored, or reamed holes fall within specified tolerance bands before parts move to the next stage of production or assembly.

This plug gage is suited for light industrial and precision manufacturing inspection where internal bore verification is required. It is commonly used on the shop floor or in inspection rooms to confirm conformance of 0.5-inch nominal holes in machined parts. Its compact size and steel construction make it practical for both bench inspection and in-process checking during production runs.

Key Features

• Class ZZ Plus tolerance rating for reliable go/no-go bore inspection
• 0.5000-inch nominal diameter for direct measurement of half-inch bores
• 0.0002-inch tolerance ensures precise conformance verification
• Steel construction for durability in production environments
• Compact single-piece design suited for bench and in-process inspection

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for applications requiring Class ZZ Plus inspection of 0.5-inch nominal internal diameters in machined components.

Installation Notes

Plug gages are used by machinists and quality control technicians and require no permanent installation. Handle the gage carefully to avoid dropping or striking, as impact damage can alter the calibrated diameter. Store in a protective case away from corrosive environments to maintain calibration integrity. Periodic recertification against traceable standards is recommended per your facility quality plan.