Spi 19-025-6 Class Zz Minus Plug Pin Gage 0.025 in

Product Description

The SPI 19-025-6 is a Class ZZ minus plug pin gage machined to a 0.025-inch nominal diameter with a tolerance of 0.0002 inches. Pin gages in this class are used to verify hole diameters, check bore sizing, and confirm feature locations in machined parts. The minus designation means the gage is manufactured to the lower boundary of the tolerance range, making it suitable for go/no-go inspection work where precise dimensional verification is required. Constructed from steel, the 19-025-6 is a standard hand-held gage used by machinists, quality technicians, and tool-and-die professionals on the shop floor or in the inspection lab.

Class ZZ plug pin gages are widely used in general-purpose dimensional inspection across manufacturing, metalworking, and precision machining environments. This gage checks small-diameter holes and bores where tight tolerances must be confirmed before parts proceed to assembly. It is suited for both production floor checks and quality control inspection stations handling steel, aluminum, and other machined materials.

Key Features

• 0.025-inch nominal diameter for small-bore inspection
• Class ZZ minus designation for go/no-go tolerance boundary checking
• 0.0002-inch tolerance for precise dimensional verification
• Steel construction for durability and wear resistance
• Compact, hand-held form factor suitable for bench or floor inspection use

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general-purpose dimensional inspection of 0.025-inch nominal diameter holes and bores in machined components.

Installation Notes

Pin gages are inspection tools and do not require mechanical installation. Handle with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store in a protective case when not in use to prevent damage to the gage surface. Follow ASME B89.1.5 or applicable shop standards for gage use, calibration intervals, and handling procedures.