Spi 19-693-1 Class Zz Minus Plug Pin Gage 0.693 in

Product Description

The SPI 19-693-1 is a Class ZZ minus plug pin gage used to verify hole diameters and internal bore dimensions in precision machining and quality control applications. Sized at 0.693 inches in diameter with a minus tolerance of 0.000200 inches, this gage provides a reliable go/no-go reference for inspecting machined features to close dimensional standards. Constructed from steel for durability and dimensional stability, it is a standard tool in machine shops, fabrication facilities, and inspection departments where repeatable, accurate hole measurement is required.

Class ZZ plug gages are the most common grade for general-purpose inspection work. This 0.693-inch minus gage is suited for verifying holes and bores in production parts, tooling, and fixtures across a range of industries including metalworking, aerospace component manufacturing, and industrial equipment assembly. It is typically used by machinists, quality technicians, and dimensional inspectors working to ASME B89 or equivalent dimensional metrology standards.

Key Features

• 0.693-inch nominal diameter for precise hole inspection
• Class ZZ tolerance grade — standard for general-purpose dimensional inspection
• Minus tolerance configuration: 0.000200 inches
• Steel construction for wear resistance and long service life
• Single-piece packaging suitable for individual replacement or kit supplementing

Compatibility

Designed as an OEM-style replacement or standard-issue plug gage for use in any inspection setup requiring a 0.693-inch Class ZZ minus plug pin gage.

Installation Notes

Plug pin gages are hand-held inspection tools and do not require installation. Handle with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store in a protective case away from other metal tools to avoid contact damage to the gage surface. Calibration and use should follow applicable dimensional metrology procedures per ASME B89 or your facility quality plan.