Spi 19-636-0 Class Zz Minus Plug Pin Gage 0.636 in

Product Description

The SPI 19-636-0 is a Class ZZ minus plug pin gage designed to check and verify hole diameters in machined parts and assemblies. It has a nominal diameter of 0.636 inches and holds a minus tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where dimensional accuracy is critical. Constructed from steel for durability and wear resistance, this pin gage is a standard tool in quality control, toolroom, and production floor environments. Machinists, quality inspectors, and precision manufacturing technicians rely on this type of gage for fast, reliable bore verification.

Class ZZ plug gages are the most common grade used in general manufacturing and production inspection. This gage is appropriate for checking bored, drilled, or reamed holes in metal, plastic, and composite workpieces. It is used wherever a simple, direct method of confirming hole size to drawing specification is needed, including receiving inspection, in-process checks, and final assembly verification.

Key Features

• Nominal diameter of 0.636 inches for direct hole-size verification
• Class ZZ tolerance class for general-purpose production inspection
• Minus tolerance of 0.0002 inches ensures the gage will not accept undersized holes
• Steel construction provides durability and resistance to wear during repeated use
• Compact and lightweight at 0.2 pounds for easy handling and storage

Compatibility

Designed as an OEM-style replacement or standard addition to any plug gage set requiring a 0.636-inch Class ZZ minus member for production or toolroom inspection use.

Installation Notes

Plug pin gages are hand-held inspection tools and require no permanent installation. Handle with clean, dry hands or lint-free gloves to prevent corrosion from skin contact. Store in a protective case away from abrasive surfaces to preserve gage accuracy. Calibrate or verify against a certified master at intervals consistent with your facility quality plan and applicable metrology standards.