Spi 19-337-5 Class Zz Minus Plug Pin Gage 0.337 in

Product Description

The SPI 19-337-5 is a Class ZZ minus plug pin gage ground to a 0.337-inch nominal diameter with a minus tolerance of 0.0002 inches. Pin gages in this class are used for go/no-go inspection of drilled, reamed, or machined holes, verifying that a bore meets its minimum acceptable dimension. Manufactured from steel for durability and dimensional stability, this gage is a standard metrology tool used by machinists, quality control technicians, and tool-and-die professionals on the shop floor or in an inspection room.

Class ZZ plug gages are the most common grade for general-purpose shop inspection work. This 0.337-inch gage is suited for checking hole diameters in production machining environments where consistent, repeatable measurement is required. The minus designation means the gage is manufactured to the lower end of the tolerance range, making it appropriate for verifying minimum hole size conformance in standard fit applications.

Key Features

• 0.337-inch nominal diameter for precise bore inspection
• Class ZZ minus tolerance of 0.0002 inches for shop-grade accuracy
• Steel construction for dimensional stability and wear resistance
• Single-piece design for straightforward go/no-go inspection workflow
• Compact and lightweight at 0.2 pounds for easy handling

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general shop inspection of 0.337-inch nominal diameter holes in machined or fabricated components.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store the gage in a protected case away from other tooling to avoid nicks or surface damage that would affect accuracy. Calibrate or verify the gage against a certified master before use in critical inspection applications. Follow your facility's gage control procedures and applicable dimensional inspection standards when using this tool in a quality system.