Spi 29-214-4 Class Zz Plus Plug Gage 0.214 in Steel

Product Description

The SPI 29-214-4 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a precise standard. It measures a nominal diameter of 0.214 inches with a tolerance of 0.0002 inches, making it suitable for inspection work that demands close dimensional control. Constructed from steel, this gage provides the durability needed for repeated use in shop-floor or toolroom environments. Machinists, quality control technicians, and tool and die professionals use Class ZZ plug gages as go/no-go inspection instruments during production runs and incoming part verification.

This plug gage is suited for use in machine shops, manufacturing facilities, and precision fabrication environments where hole diameter verification is a routine part of quality assurance. It is appropriate for both production inspection and bench inspection tasks. The 0.214-inch nominal diameter fits a range of drilled, reamed, or bored hole applications encountered in general metalworking and precision machining operations. Its compact size and steel construction make it easy to handle and store in a standard gage block or plug gage set tray.

Key Features

• Nominal measurement diameter of 0.214 inches for precise bore verification
• Class ZZ Plus tolerance of 0.0002 inches for close-tolerance inspection work
• Steel construction for durability and resistance to wear during repeated use
• Compact single-piece design suitable for toolroom and shop-floor use
• Individual unit packaging for straightforward inventory and storage

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for applications requiring a 0.214-inch nominal diameter Class ZZ inspection standard in steel construction.

Installation Notes

Plug gages should be handled by qualified inspection personnel or machinists familiar with dimensional gauging practices. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Do not force the gage into a bore; if resistance is met, the hole is undersized and should be evaluated before further gauging. Store away from abrasive materials to maintain calibration integrity.