Spi 19-694-9 Class Zz Minus Plug Pin Gage 0.694 in

Product Description

The SPI 19-694-9 is a Class ZZ minus plug pin gage used to verify hole diameters and bore sizes in precision inspection and quality control applications. Manufactured from steel, this go-type gage checks that a hole is at or above its minimum acceptable diameter. The 0.694-inch nominal diameter and 0.0002-inch minus tolerance make it suitable for inspection tasks that require a defined pass-or-reject result. Machinists, toolroom technicians, and quality inspectors use plug gages like this one to confirm dimensional conformance without relying on variable measuring instruments.

Class ZZ is the most common tolerance class for shop-floor and general inspection use. This gage is appropriate for checking drilled, reamed, or bored holes in metal, plastic, or composite workpieces where a 0.694-inch nominal bore is the target dimension. The minus designation means the gage is ground to the lower end of the tolerance band, confirming minimum material condition. It is typically used as part of a go/no-go gage set or as a standalone go gage in production inspection routines.

Key Features

• Class ZZ tolerance class for general shop-floor and production inspection use
• Minus designation confirms minimum acceptable hole diameter
• 0.0002-inch tolerance provides reliable pass-or-reject inspection results
• Steel construction for durability in typical machining and toolroom environments
• 0.694-inch nominal diameter for direct bore verification without calculation

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for any application requiring inspection of a 0.694-inch nominal bore to Class ZZ minus standards.

Installation Notes

Plug pin gages are handled by quality technicians, machinists, and inspection personnel and require no permanent installation. Always clean the gage and the bore before use to prevent false readings or surface damage. Store the gage in its case or protective sleeve when not in use to preserve the ground surface. Handle with care to avoid drops or contact with abrasive surfaces that could alter the gage diameter.