Spi 29-827-3 Class Zz Plus Plug Gage 0.827 in

Product Description

The SPI 29-827-3 is a Class ZZ Plus plug gage designed for checking the dimensional accuracy of holes and bores with a nominal diameter of 0.827 inches. Built to Class ZZ tolerance standards with a tolerance of 0.0002 inches, this gage provides reliable go/no-go verification in production and inspection environments. The steel construction ensures durability under repeated use. Machinists, toolroom technicians, and quality control inspectors use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specified dimensional limits before parts move to the next stage of production.

This plug gage is suited for use in machine shops, manufacturing facilities, and inspection departments where hole diameter verification is part of standard quality assurance workflow. It is appropriate for both incoming inspection of raw materials and in-process checks on machined components. The 0.827-inch diameter makes it a specific-purpose gage for applications requiring that exact nominal size. Class ZZ is the most commonly used tolerance class for general-purpose shop gages, balancing cost and accuracy for high-volume inspection tasks.

Key Features

• Nominal diameter of 0.827 inches for precise hole verification at that specific size
• Class ZZ Plus tolerance of 0.0002 inches meets standard go/no-go inspection requirements
• Steel construction provides durability and resistance to wear under repeated use
• Compact and lightweight at 0.2 pounds for easy handling during inspection
• Single-piece package quantity supports individual replacement or toolroom stocking

Compatibility

Designed as an OEM-style replacement or direct addition to existing plug gage sets used for general-purpose hole inspection at a nominal diameter of 0.827 inches.

Installation Notes

Plug gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store the gage in its protective case when not in use to avoid damage to the precision-ground surfaces. Verify the gage against a calibrated master or ring gage periodically to confirm it remains within tolerance. No machining or modification of the gage is permitted, as this will invalidate its tolerance class rating.