Spi 19-537-0 Class Zz Minus Plug Pin Gage 0.537 in

Product Description

The SPI 19-537-0 is a Class ZZ minus plug pin gage machined from steel, used to verify that a hole or bore meets its minimum acceptable size. At 0.537 inches in diameter with a tolerance of 0.0002 inches, this gage provides a reliable no-go or go reference for precision inspection work. Class ZZ is the standard tolerance class for production-level gaging, suited to general manufacturing and quality control environments. Machinists, tool and die makers, and quality technicians use plug pin gages as part of routine dimensional inspection to confirm that manufactured parts fall within drawing specifications.

This gage is used in machine shops, fabrication facilities, and inspection departments wherever hole diameter verification is required. The minus designation means the gage is ground to the lower boundary of the nominal dimension, making it appropriate for checking minimum material condition on through-holes, blind holes, and bored features in metal and plastic components. It is well suited to production floor inspection as well as incoming and outgoing quality checks.

Key Features

• Class ZZ tolerance class for production-grade dimensional inspection
• Minus designation for minimum material condition verification
• 0.537 inch nominal diameter with 0.0002 inch tolerance
• Steel construction for durability and wear resistance
• Single-piece plug pin format for straightforward go or no-go use

Compatibility

Designed as a standard Class ZZ minus plug pin gage suitable for use with conventional gage handle sets and pin gage handle holders sized for the 0.537 inch diameter range.

Installation Notes

Plug pin gages are used by quality control technicians and machinists and require no permanent installation. Clean both the gage and the workpiece bore before use to prevent false readings caused by debris or cutting fluid. Store the gage in a protective case away from other metal tools to avoid nicks or surface damage that would compromise accuracy. Calibration against a traceable standard is recommended at regular intervals in accordance with your facility quality plan.