Spi 29-335-7 Class Zz Plus Plug Gage 0.335 in

Product Description

The SPI 29-335-7 is a Class ZZ Plus plug gage used to verify bore diameters to a tolerance of 0.0002 inches. It measures a nominal diameter of 0.335 inches and is manufactured from steel for durability and dimensional stability. This gage is a go/no-go style inspection tool used during quality control and machining operations to confirm that drilled, reamed, or bored holes meet specified size limits. Machinists, tool-and-die makers, and quality technicians use plug gages like this to enforce tight tolerances on production and repair work.

The 29-335-7 is suited for inspection of small-diameter bores in precision machining environments, including production floors, tool rooms, and maintenance shops. It applies wherever a 0.335-inch nominal bore must be confirmed within Class ZZ Plus tolerances. This size range is common in light mechanical assemblies, fixture work, and component fit verification.

Key Features

• 0.335-inch nominal measurement diameter for small-bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for tight dimensional control
• Steel construction for wear resistance and long service life
• Compact, lightweight design at 0.2 pounds for easy single-hand use
• Single-piece package quantity — no minimum-quantity commitment beyond one unit

Compatibility

Designed as an OEM-style go/no-go inspection gage for any application requiring verification of a 0.335-inch nominal bore diameter within Class ZZ Plus tolerance standards.

Installation Notes

Plug gages are handled and used by machinists or quality inspection personnel — no licensed trade certification is required, but proper metrology practice should be followed. Clean the gage and bore before use to prevent debris from affecting the reading. Never force the gage into a bore; use light, controlled hand pressure to avoid damage to the gage or the workpiece. Store the gage in a protective case away from temperature extremes to maintain dimensional accuracy.