Spi 29-411-6 Class Zz Plus Plug Gage 0.411 in

Product Description

The SPI 29-411-6 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a tight tolerance of 0.0002 inches. It measures a nominal diameter of 0.411 inches and is constructed from steel for durability in shop environments. Class ZZ Plus gages are go/no-go inspection tools used in dimensional quality control. Machinists, tool-and-die technicians, and metrology staff use plug gages to confirm that drilled, reamed, or bored holes fall within print tolerance. The 29-411-6 is a single-end gage suited for repetitive inspection tasks on the shop floor or in a quality lab.

This plug gage is appropriate for use in precision machining, fabrication, and inspection environments where hole diameter conformance must be verified before assembly. It is well-suited for checking holes in metal components where a 0.411-inch nominal diameter is specified. Class ZZ Plus represents a commercial-grade tolerance class commonly used for production inspection rather than master or reference gage applications.

Key Features

• 0.411-inch nominal measurement diameter for direct bore inspection
• Class ZZ Plus tolerance class rated at 0.0002 inches for production-grade accuracy
• Steel construction provides wear resistance during repetitive use
• Compact and lightweight at 0.2 pounds for easy one-handed handling
• Single-unit packaging suitable for individual tooling requirements

Compatibility

Designed as an OEM-style replacement or direct addition to existing plug gage sets for production inspection of 0.411-inch nominal diameter holes in machined metal components.

Installation Notes

Plug gages do not require permanent installation. Handle the gage with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, verify the gage is clean and free of debris that could affect measurement accuracy. Store in a protective case away from temperature extremes to maintain calibration integrity.