Spi 29-589-9 Class Zz Plus Plug Gage 0.589 Inch

Product Description

The SPI 29-589-9 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored, drilled, and reamed holes. It measures hole diameters to a nominal size of 0.589 inches with a tolerance of 0.0002 inches, making it suitable for precision inspection work in manufacturing, toolroom, and quality-control environments. Constructed from steel, the gage provides the durability and wear resistance expected in production settings. Machinists, quality inspectors, and toolroom technicians use this type of gage to verify that machined holes fall within specified tolerances without the need for electronic measurement equipment.

Class ZZ Plus plug gages are used in light production and inspection applications where hole diameter verification is required. This gage is appropriate for shop-floor and bench inspection of metal and machined components across general manufacturing, aerospace, and automotive part production. Its compact size and single-piece construction make it straightforward to use in both high-volume inspection lines and low-volume toolroom checks.

Key Features

• Nominal measurement diameter of 0.589 inches for precise hole inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus accuracy requirements
• Steel construction provides wear resistance and dimensional stability
• Suitable for go/no-go inspection of drilled, bored, and reamed holes
• Compact form factor fits standard toolroom and production inspection workflows

Compatibility

Designed as an OEM-style inspection gage for use wherever a 0.589 inch nominal diameter Class ZZ Plus plug gage is specified in production or toolroom inspection procedures.

Installation Notes

Plug gages are handled and used by machinists and quality inspectors and do not require installation in the traditional sense. Store the gage in a protective case when not in use to prevent damage to the precision-ground surfaces. Clean the gage and the hole being inspected before use to prevent false readings caused by chips or debris. Avoid dropping or striking the gage, as impact damage can alter the ground diameter and compromise measurement accuracy.