Spi 29-762-2 Class Zz Plus Plug Gage 0.762 in

Product Description

The SPI 29-762-2 is a Class ZZ Plus plug gage designed to verify the internal diameter of machined holes to a nominal size of 0.762 inches. Built from steel, it provides reliable go/no-go inspection capability for shops and quality-control environments where tight dimensional verification is required. The gage holds a tolerance of 0.0002 inches, making it suitable for applications that demand precise bore acceptance checking. Machinists, tool-and-die technicians, and quality inspectors use plug gages like this one as a fast, repeatable method for confirming hole conformance to print dimensions without relying on a measuring instrument readout.

This plug gage is used in metalworking, manufacturing, and precision machining environments for incoming inspection, in-process quality checks, and final part verification. It is appropriate for use on drilled, reamed, or bored holes where the 0.762-inch nominal diameter must be confirmed within close tolerance. Class ZZ Plus gages are commonly used in production settings where moderate-accuracy inspection is required and gage wear must be tracked over time.

Key Features

• 0.762-inch nominal diameter for direct bore verification at that size
• Class ZZ Plus tolerance of 0.0002 inches for consistent, repeatable inspection
• Steel construction for durability in shop-floor and inspection-room environments
• Compact, single-piece plug format for fast go/no-go checking without instrument readout
• Lightweight at 0.2 pounds for easy handling during high-volume inspection tasks

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for inspecting internal bores with a nominal diameter of 0.762 inches in standard metalworking and precision machining applications.

Installation Notes

Plug gages are handled and applied by machinists, quality technicians, and inspection personnel — no power source or mechanical installation is required. Before use, clean both the gage and the bore being checked to remove chips, coolant, and debris that could affect the reading. Never force a plug gage into a hole; light hand pressure is sufficient and forcing will cause premature gage wear or bore damage. Periodic calibration against certified master gages is recommended to maintain traceable accuracy.