Spi 19-648-5 Class Zz Minus Plug Pin Gage 0.648 in

Product Description

The SPI 19-648-5 is a Class ZZ minus plug pin gage used to verify hole diameters and bore tolerances in precision machining and inspection work. Manufactured from steel, this go-no-go style pin checks a nominal diameter of 0.648 inches with a tolerance of 0.0002 inches, making it suitable for dimensional inspection tasks where consistent, repeatable measurement is required. At 0.2 pounds, it is a compact, hand-held tool suited for bench inspection stations, shop floor use, or incoming quality control. Machinists, quality technicians, and tool and die professionals rely on plug gages of this class for fast, reliable part verification.

Class ZZ plug gages are the standard working-grade gage for general-purpose inspection of drilled, reamed, or bored holes in production environments. This minus gage is used on the low end of the tolerance range to confirm that a hole meets minimum diameter specifications. Typical applications include inspecting machined components in manufacturing, job shop, and quality assurance settings across metalworking, aerospace, and industrial production environments.

Key Features

• Nominal diameter of 0.648 inches for direct hole verification at that size
• Class ZZ tolerance rating of 0.0002 inches suits general-purpose production inspection
• Minus configuration checks the lower limit of hole diameter tolerance
• Steel construction provides durability for repeated shop floor use
• Compact and lightweight at 0.2 pounds for easy single-hand operation

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for inspecting holes with a nominal diameter of 0.648 inches in standard machined components. Confirm that the target tolerance range and gage class meet your inspection plan requirements before use.

Installation Notes

Plug pin gages are used by quality technicians and machinists and require no installation. Clean the gage and the workpiece bore before use to avoid measurement error caused by chips or debris. Store the gage in a protective case away from other tooling to prevent surface damage that could affect accuracy. Handle with care and recalibrate or replace if the gage shows signs of wear beyond its stated tolerance.