Spi 29-136-9 Class Zz Plus Plug Gage 0.136 Inch

Product Description

The SPI 29-136-9 is a Class ZZ Plus plug gage used to inspect and verify hole diameters in precision machining and manufacturing applications. Manufactured from steel, this go/no-go style gage checks a nominal diameter of 0.136 inches with a tolerance of 0.0002 inches, making it suitable for quality control work where tight dimensional accuracy is required. Machinists, tool and die makers, and QC inspectors use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specification before parts move to the next stage of production.

This gage is intended for use in shop floor and inspection room environments where small-diameter hole verification is part of a standard quality process. The 0.136 inch nominal size fits into workflows involving close-tolerance bores common in precision components. Its steel construction holds up under repeated use in production settings. The compact size and light weight of 0.2 pounds make it easy to handle during inspection cycles.

Key Features

• Nominal measurement diameter of 0.136 inches for small-bore inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for precision go/no-go verification
• Steel construction for durability in production and inspection environments
• Lightweight at 0.2 pounds for easy single-hand use during inspection
• Individual unit packaging supports single-gage procurement and inventory control

Compatibility

Designed as an OEM-style plug gage replacement or addition for precision inspection setups requiring verification of 0.136 inch nominal diameter holes to Class ZZ Plus standards.

Installation Notes

Plug gages are handled and used by machinists and quality control inspectors, not installed in the traditional sense. Store the gage in a protective case when not in use to prevent damage to the measuring surface. Clean the gage and the hole being measured before use to avoid false readings caused by chips or debris. Do not force the gage into an undersized hole, as this can damage the gage or the workpiece.